Dental Ceramics Most Important MCQs

1 - 1st formed dental tissue______________?

---

A. Enamel

---

B. Dentin

---

C. Cementum

---

D. Bone

---

Dentin

2 - A suitable fixative for a routine biopsy specimen is_____________?

---

A. 10% formalin

---

B. 40% formalin

---

C. 20% formalin

---

D. 10% alcohol

---

10% formalin

3 - A supernumerary tooth results from a deviation during_____________?

---

A. Initiation

---

B. Differentiation

---

C. Apposition

---

D. Calcification

---

Initiation

4 - About zinc oxide eugenol all are true except_______________?

---

A. ZnO is converted to Zn(OH)2

---

B. Reaction is autocatalytic

---

C. Water is the byproduct of reaction

---

D. Dehydrated ZnO reacts with dehydrated eugenol

---

Dehydrated ZnO reacts with dehydrated eugenol

5 - Accentuated incremental lines in dentin are______________?

---

A. Incremental lines of retzius

---

B. Incremental lines of von Ebner

---

C. Contour lines lines of owen

---

D. None of the above

---

Contour lines lines of owen

6 - Accentuated incremental lines in dentin due to disturbances in matrix and mineralization process is_____________?

---

A. Incremental lines of retzius

---

B. Incremental lines of vonebner

---

C. Contour lines of owen

---

D. None of the above

---

Contour lines of owen

7 - Accessory canals result from____________?

---

A. Defects in cementogenesis

---

B. Dividing epithelial bridges

---

C. Break in Hertwig's root sheath

---

D. Adherent epithelial rests

---

Break in Hertwig's root sheath

8 - Acellular cementum is typically found in_____________?

---

A. Coronal half of root

---

B. Apical half of root

---

C. Apex of root

---

D. Entire root

---

Coronal half of root

9 - Advantage of zinc phosphate over GIC is______________?

---

A. High compressive strength

---

B. Tensile strength

---

C. High modulus of elasticity

---

D. Diametral strength

---

High modulus of elasticity

10 - Age hardening is a process done at______________?

---

A. Heating up to 200 – 450°C for 15 – 30 min and quenching in water

---

B. Heating at 700°C for 10 – 15 min and quenching in water

---

C. Heating at 700°C for 1 hour and quenching in water

---

D. Heating above 700°C for 30 min and quenching in water

---

Heating up to 200 – 450°C for 15 – 30 min and quenching in water

11 - All factors govering dentine permeability EXCEPT_______________?

---

A. Smear layer

---

B. Fluid convection

---

C. Length of dentinal tubules

---

D. Diffusion coefficient

---

Fluid convection

12 - All of the following are true for traditional solution liner, except_________________?

---

A. It is not necessary in moderately deep cavities under glass ionomer restoration

---

B. Have Film thickness of 1 – 50 microns

---

C. Do not provide thermal or electric insulation

---

D. Protect the pulp from reaction products leaching out of restoration

---

Have Film thickness of 1 – 50 microns

13 - All of the following is true about dentinal tubules except______________?

---

A. Inner pulpal layer contains more dentinal tubules than outer dentin layer

---

B. The diameter of dentin tubules ranges from 5 to 7μm

---

C. The diameter of dentinal tubule is more at pulpal layer than outer layer

---

D. The bonding is more on the inner layer of dentin compared to outer surface

---

The diameter of dentin tubules ranges from 5 to 7μm

14 - All of the following is used as accelerator in zinc oxide eugenol cement except_____________?

---

A. Acetic acid

---

B. Zinc acetate dehydrate

---

C. Calcium chloride

---

D. Bromoglycerine

---

Bromoglycerine

15 - All of the following is used as accelerator in zinc oxide eugenol cement except_______________?

---

A. Acetic acid

---

B. Zinc acetate dehydrate

---

C. Calcium chloride

---

D. Bromoglycerine

---

Bromoglycerine

16 - All of the following statements are true for zinc oxide eugenol cements except______________?

---

A. Equal lengths of base paste and accelerator paste are mixed together until the mix has a uniform colour

---

B. The mix appear thick at the start of mixing but after 30 seconds of additional spatulation it becomes more fluid

---

C. Water accelerates but heat retards the setting of zinc oxide eugenol cements

---

D. Both B & C

---

Both B & C

17 - Among the difference between teeth in the decidous and the permanent dentition is that_____________?

---

A. Buccal surfaces of the permanent molars are flatter

---

B. Cervical ridges are more pronounced in permanent molars

---

C. Root trunks of decidous teeth are larger compared with their overall root lengths

---

D. Crowns of decidous incisors are wider mesiodistally than their cervico incisal lengths

---

Crowns of decidous incisors are wider mesiodistally than their cervico incisal lengths

18 - Any insult to cells in apposition stage result in______________?

---

A. Hutchinson's incisor

---

B. Osteodentin formation

---

C. Enamel hypoplasia

---

D. Anodontia

---

Enamel hypoplasia

19 - At the CEJ cementum overlaps enamel about____________?

---

A. 55 to 60%

---

B. 60 to 65%

---

C. 65 to 70%

---

D. 70 to 75%

---

60 to 65%

20 - At the cemento enamel junction, which of the following occurs_____________?

---

A. Cementum meets enamel

---

B. Cementum overlaps enamel

---

C. Cementum does not meet enamel

---

D. All of the above

---

All of the above

21 - Atypical or osteodentin is formed due to disturbance during____________?

---

A. Morphodifferentiation

---

B. Histodifferentiation

---

C. Apposition

---

D. Initiation

---

Histodifferentiation

22 - Average particle size of powdered gold is________________?

---

A. 10 um

---

B. 15 um

---

C. 30 um

---

D. 0.1 um

---

15 um

23 - Best marginal seal is provided by____________?

---

A. Zinc phosphate

---

B. Zinc oxide eugenol

---

C. Gutta-percha

---

D. Resin

---

Zinc oxide eugenol

24 - Blood supply of ameloblast for most of its life cycle comes form_______________?

---

A. Dental papilla

---

B. Reduced enamel organ

---

C. Dental Sac

---

D. Dental pulp

---

Dental Sac

25 - Bundle bone is part of____________?

---

A. Periodontal ligament

---

B. Alveolar bone

---

C. Cementum

---

D. Longbones

---

Alveolar bone

26 - Butt joint in cementoenamel junctions seen is _________% of cases?

---

A. 0.1

---

B. 0.3

---

C. 0.6

---

D. 0.9

---

0.3

27 - Calcified tissue is absent in______________?

---

A. Enamel

---

B. Dentin

---

C. Cementum

---

D. Pulp

---

Pulp

28 - Cavity varnishes have_____________?

---

A. Average bonding to tooth

---

B. Low bonding to tooth

---

C. Excellent bonding to tooth

---

D. No bonding to tooth

---

No bonding to tooth

29 - Cellular cementum and compact bone contain____________?

---

A. Sharpehy's fibres and elastic fibres

---

B. Collagen fibres and blood vessels

---

C. Canaliculi and incremental lines

---

D. Lacunae and elastic fibres

---

Canaliculi and incremental lines

30 - Cellular cementum is____________?

---

A. First formed cementum

---

B. Less calcified than acellular type

---

C. More calcified than acellular type

---

D. Less irregular

---

Less calcified than acellular type

31 - Cementum formation is seen_______________?

---

A. After dentin formation

---

B. Before dentin formation

---

C. Both are formed at same time

---

D. None of the above

---

After dentin formation

32 - Cementum is_____________?

---

A. Avascular

---

B. Vascular

---

C. Has blood supply initially only

---

D. None of the above

---

Avascular

33 - Cementum that forms in conjunction with root end formation and eruption_____________?

---

A. Cellular cementum

---

B. Acellular cementum

---

C. Both of the above

---

D. None of the above

---

Cellular cementum

34 - Cementum_____________?

---

A. Is derived from the sheath of hertwig

---

B. Is acellular in the apical third of the tooth

---

C. Often overlaps the enamel

---

D. Does not contain collagen fibres

---

Often overlaps the enamel

35 - Ceramics fired to metals are processed by_______________?

---

A. Heat pressing

---

B. Machining

---

C. Sintering

---

D. Slip casting

---

Sintering

36 - Cervical bulge. True is____________?

---

A. Enamel rods at cervical region directed occlusally

---

B. Results in constriction at cervical region

---

C. Is characteristic of decidous teeth

---

D. All of the above

---

Is characteristic of decidous teeth

37 - Chemical method of strengthening porcelain involves_________________?

---

A. Exchange of aluminium and sodium ions

---

B. Exchange of aluminium and potassium ions

---

C. Exchange of sodium and potassium ions

---

D. None of the above

---

Exchange of sodium and potassium ions

38 - Chemical tempering in porcelains is done to interrupt crack propagation by______________?

---

A. Transformation toughening

---

B. Dispersion of crystalline phase

---

C. Inducing residual compressive strength

---

D. All of the above

---

Inducing residual compressive strength

39 - Chronic periapical inflammation is usually associated with____________?

---

A. Ankylosis

---

B. Resorption of cementum

---

C. Hypertrophy of cementum

---

D. Hyperplasia of cementum

---

Hyperplasia of cementum

40 - Clogging of an abrasive wheel with debris causing reduction of abrasive action is called________________?

---

A. Blinding

---

B. Buffing

---

C. Dressing

---

D. Truing

---

Blinding

41 - Coefficient of thermal expansion of metal-ceramic alloys is________________?

---

A. Same as porcelain

---

B. More than porcelain

---

C. Less than porcelain

---

D. More than or equal to porcelain but not less

---

More than or equal to porcelain but not less

42 - Cohesion of gold foil is an example of______________?

---

A. Atomic attraction and welding

---

B. Annealing

---

C. Wedging

---

D. Adaptation

---

Atomic attraction and welding

43 - Compared to the inter tubular dentin, peritubular dentin is characterized by which of the following ?

---

A. Greater stainability

---

B. Lasser content of inorganic salts

---

C. greater content of inorganic salts

---

D. Greater content of large collagen fibres

---

greater content of inorganic salts

44 - Compared with dental alloys, CERAMICS show____________________?

---

A. High ductility

---

B. High hardness

---

C. Low esthetic value

---

D. Susceptibility to brittle fracture

---

Susceptibility to brittle fracture

45 - Condensation shrinkage of porcelain during firing depends on__________________?

---

A. Rate of arriving at firing temperature

---

B. Uniformity of particle size

---

C. Shape and size of particle

---

D. Type of investment used

---

Shape and size of particle

46 - Crocus cloth is________________?

---

A. Emery

---

B. Garnet

---

C. Pumice

---

D. Rouge

---

Rouge

47 - Cusp of carbaelli can be considered a normal finding on____________?

---

A. Decidous mandibular 1st molar

---

B. Decidous maxillary 1st molar

---

C. Decidous maxillary 2nd molar

---

D. Decidous mandibular 2nd molar

---

Decidous maxillary 2nd molar

48 - Dead tracts in ground section appears as_____________?

---

A. Dentinal tubules

---

B. Coarse fibril bundles arranged at right angle to the dentinal surface

---

C. Black in transmitted light and white in reflected light

---

D. White in transmitted light and dark in reflected light

---

Black in transmitted light and white in reflected light

49 - Dehydration of specimen is carried out by____________?

---

A. By using 10% formalin

---

B. By using liquid or solid Co2

---

C. By using increasing percentages of alcohol

---

D. By using 5% nitric acid

---

By using increasing percentages of alcohol

50 - Dental lamina is active up to_______________?

---

A. 1 year

---

B. 2 years

---

C. 3 years

---

D. 4 years

---

4 years

51 - Dental papilla gives rise to_____________?

---

A. Pulp only

---

B. Pulp & Dentin

---

C. Pulp & Periodontal ligament

---

D. All of the above

---

Pulp & Dentin

52 - Dental porcelains are crystalline materials of________________?

---

A. Rubber

---

B. Plastic

---

C. Organic substances

---

D. Glass

---

Glass

53 - Dentin formed through out the life is______________?

---

A. Sclerotic dentin

---

B. Secondary dentin

---

C. Reparative dentin

---

D. All of the above

---

Secondary dentin

54 - Dentinal tubules are calcified in_______________?

---

A. Sclerotic dentin

---

B. Primary dentin

---

C. Secondary dentin

---

D. Interglobular dentin

---

Sclerotic dentin

55 - Dentinal tubules are______________?

---

A. Concave

---

B. Straight

---

C. S0shaped

---

D. None of the above

---

S0shaped

56 - Dentinogenesis by odontoblasts first begins at_____________?

---

A. Pulpal end

---

B. Cusp tip

---

C. Tooth bud stage

---

D. Cervical area

---

Cusp tip

57 - Dicor restoration is_______________?

---

A. Two coloured restorations

---

B. Heat pressed ceramics

---

C. Castabel ceramic

---

D. None of the above

---

Castabel ceramic

58 - Difference between primary and permanent enamel is_______________?

---

A. In prism arrangement

---

B. in mineral content

---

C. No difference in enamel, difference in dentin

---

D. None of the above

---

In prism arrangement

59 - Direct filling gold formed by electrolytic precipitation is called by all the terms EXCEPT______________?

---

A. Crystalline

---

B. Granular gold

---

C. Mat gold

---

D. Sponge gold

---

Granular gold

60 - Dispersion of crystalline phase to strengthen ceramics results in_________________?

---

A. dispersed porcelain

---

B. Glazed porcelain

---

C. aluminium porcelain

---

D. All of the above

---

aluminium porcelain

61 - Disturbance during the morphodifferentition stage of tooth development will result in______________?

---

A. Change in number of teeth

---

B. Ameloblastoma

---

C. Change in form and shape of the teeth

---

D. Hypoplasia

---

Change in form and shape of the teeth

62 - During the development of a tooth, sound coalescence of the lobes results in_____________?

---

A. Grooves

---

B. Fissures

---

C. Cusps

---

D. All of the above

---

Grooves

63 - During the formation of primary teeth_______________?

---

A. Enamel forms more cervically than dentin

---

B. Enamel forms faster than dentin

---

C. Dentin forms faster than enamel

---

D. Processes of their cells remain in content with each other

---

Dentin forms faster than enamel

64 - Ectodermal cells in tooth bud are responsible for_______________?

---

A. Determination of shape of crown and root

---

B. Formation of periodontal ligament

---

C. Formation of cementum

---

D. Formation of pulp

---

Determination of shape of crown and root

65 - Electralloy is an alloy of________________?

---

A. Gold and Platinum

---

B. Cobalt and Chromium

---

C. Gold and Calcium

---

D. Tin and chromium

---

Gold and Calcium

66 - Electrolyte used for plating copper dies is________________?

---

A. Ionic copper

---

B. Copper cyanide

---

C. Silver cyanide

---

D. Acidic copper sulphate

---

Acidic copper sulphate

67 - Enamel pearls are found in_____________?

---

A. Occlusal surface of premolars

---

B. Furcation areas of permanent molars

---

C. On the incisal edges of incisors

---

D. None of the above

---

Furcation areas of permanent molars

68 - Epithelial attachment is derived from____________?

---

A. Reduced enamel epithelium

---

B. Dental papilla

---

C. Inner enamel epithelium

---

D. Dental sac

---

Reduced enamel epithelium

69 - Ethoxy benzoic acid increases the strength and solubility of the cement______________?

---

A. Zinc oxide eugenol

---

B. Polycarboxylate cement

---

C. Zinc phosphate cement

---

D. Silicate cement

---

Zinc oxide eugenol

70 - Eugenol may be replaced in the zinc oxide eugenol cement by______________?

---

A. Acetic acid

---

B. Alginic acid

---

C. Phosphoric acid

---

D. Ortho-ethoxy acid

---

Ortho-ethoxy acid

71 - Excess deposition of calcium in the dentinal tubules is referred to as______________?

---

A. Sclerotic dentin

---

B. Mantal dentin

---

C. Interglobular dentin

---

D. Intertubular dentin

---

Sclerotic dentin

72 - Extracted teeth should be preserved in_____________?

---

A. Saline

---

B. Xylene

---

C. 10% Formalin

---

D. 10% alcohol

---

10% Formalin

73 - First appearance of tooth formation occurs in____________?

---

A. 6th week IU

---

B. 2nd week IU

---

C. 9th week IU

---

D. 4th week IU

---

6th week IU

74 - Fluid flow, in or out of the dentinal tubules is proportional to the tuble diameter by______________?

---

A. Third power of the diameter

---

B. Sixth power of the diameter

---

C. Square of the diameter

---

D. Fourth power of the diameter

---

Fourth power of the diameter

75 - Fluoride rich materials include ?

---

A. Silicate cement

---

B. Glass ionomer cement

---

C. Polycarboxylate cement

---

D. All of the above

---

All of the above

76 - Flux used in dental ceramic is________________?

---

A. Alumina

---

B. Silica

---

C. Kaolin

---

D. Boric oxide

---

Boric oxide

77 - Following is derivative of dental lamina____________?

---

A. Epithelial rests of Malassez

---

B. Enamel pearls

---

C. Rests of serrae

---

D. All of the above

---

Rests of serrae

78 - For porcelain fused to metal crown, the porcelain should have ______________?

---

A. High fusion expansion

---

B. High fusion temperature

---

C. Linear coefficient of thermal expansion less than that of metal

---

D. Linear coefficient of thermal expansion more than that of metal

---

Linear coefficient of thermal expansion less than that of metal

79 - Formula of hydroxyapatite crystal is____________?

---

A. Ca3 (Po4)2 CaCo3

---

B. 3Ca (Po4)2 Ca(OH)2

---

C. CaPo4 Ca(OH)2

---

D. None of the above

---

3Ca (Po4)2 Ca(OH)2

80 - Frozen sections can be used for the demonstration of_____________?

---

A. Fat

---

B. Mucin

---

C. Cartilage

---

D. Iron

---

Fat

81 - Frozen slab technique is applicable to_____________?

---

A. Zinc phosphate cement

---

B. Glass Ionomer cement

---

C. Zinc oxide Eugenol cement

---

D. Resin cement

---

Zinc phosphate cement

82 - Frozen slab technique of mixing zinc phosphate is used for_______________?

---

A. Cementing crowns

---

B. Temporary dressing

---

C. base

---

D. cementing orthodontic bands

---

Cementing crowns

83 - Glass ionomer cements are composed of______________?

---

A. Alumino silicate powder and phosphoric acid

---

B. Aluminosillicate powder and polyacrylate

---

C. Zinc oxide powder and phosphoric acid

---

D. Zinc oxide powder and polyacrylate liquid

---

Aluminosillicate powder and polyacrylate

84 - Greening occuring when porcelains are fired on silver free alloys may be attributed to________________?

---

A. Vaporization of silver from the walls of contaminated furnaces

---

B. Surface diffusion of silver from the marginal metal

---

C. More rapid silver diffusion in sodium containing glass

---

D. Silver ionization by porcelains with high oxygen potential

---

Vaporization of silver from the walls of contaminated furnaces

85 - Gubernacular canal and gubernacular cord are seen in relation to____________?

---

A. Permanent teeth

---

B. Deciduous teeth

---

C. Succedaneous teeth

---

D. None of the above

---

Succedaneous teeth

86 - Gubernacular canal guides the eruption of_____________?

---

A. Primary teeth

---

B. Permanent teeth

---

C. Both A and B

---

D. None of the above

---

Permanent teeth

87 - Hammock ligament is present_______________?

---

A. Between temporal and sphenoid bone

---

B. Between hamular notch and mandible

---

C. In apical area of a tooth

---

D. As a part of deep cervical fascia

---

As a part of deep cervical fascia

88 - Hardness of fully mineralized cementum is_____________?

---

A. Less than dentin

---

B. More than dentin

---

C. Equal dentin

---

D. None of the above

---

Less than dentin

89 - Hertwig's epithelial root sheath is made up of_______________?

---

A. Outer and inner enamel epithelium

---

B. Stratum intermedium

---

C. Stellate reticulum

---

D. Hyaline layer of Hopewell-smill

---

Outer and inner enamel epithelium

90 - High levels of albumin is present in____________?

---

A. Inner enamel epithelium

---

B. Outer enamel epithelium

---

C. Stellate reticulum

---

D. Stratum intermedium

---

Stellate reticulum

91 - How many cusps does the crown of the maxillary first primary molar have ?

---

A. 2

---

B. 3

---

C. 4

---

D. 5

---

4

92 - How many pulpal horns are there in the mandibular second primary molar ?

---

A. 3

---

B. 6

---

C. 4

---

D. 5

---

5

93 - How many roots does a primary maxillary first molar have ___________?

---

A. One

---

B. Two

---

C. Three

---

D. Four

---

Three

94 - If cementum is not formed______________?

---

A. Ankylosis may occur

---

B. Exforliation of teeth occur

---

C. Delayed eruption

---

D. No change occurs

---

Exforliation of teeth occur

95 - If overgrowth of cementum does not improve the functional qualities of cementum, it is termed as_____________?

---

A. Hyperplasia

---

B. Hypoplasia

---

C. Hypertrophy

---

D. Excementoses

---

Hyperplasia

96 - In adult teeth, the type of dentin present underlying dentin-enamel junction is_______________?

---

A. Predentin

---

B. Mantle dentin

---

C. Interglobular dentin

---

D. Tertiary dentin

---

Mantle dentin

97 - In cap stage, regulating factor for cusp shape formation is present in____________?

---

A. Dental papilla

---

B. Dental follicle

---

C. Inner enamel epithelium

---

D. Enamel Knot

---

Enamel Knot

98 - In considering the process of eruption, the pre-functional eruptive stage of a tooth begins when the_____________?

---

A. Bud stage begins

---

B. Cap stage begins

---

C. Bell stage begins

---

D. Dental lamina begins forming

---

Dental lamina begins forming

99 - In method of firing: A shorter firing period at a higher temperature is considered better_______________?

---

A. A large time period at a lower temperature is preferred

---

B. A long firing period at a very high temperature is preferred

---

C. A short firing period at a very low temperature is preferred

---

D. none of these

---

A long firing period at a very high temperature is preferred

100 - In mineralization which one of the following is known as Epitaxy ?

---

A. Booster Mechanism

---

B. Seeding theory

---

C. Alkaline Phosphatase theory

---

D. Cartier/s Adenosine Triphosphate theory

---

Seeding theory

101 - In multirooted teeth, formation of multiple roots is due to presence of_____________?

---

A. Epithelial diaphragm

---

B. Cell rests of Malassez

---

C. Toot bud division or bell stage

---

D. None of the above

---

Epithelial diaphragm

102 - In non-eugenol pastes the constituents are mixed in______________?

---

A. Phosphoric Acid

---

B. Ethyl alcohol

---

C. Benzoic acid

---

D. None of the above

---

Benzoic acid

103 - In porcelain metal elements are embedded in the matrix of________________?

---

A. Rubber matrix

---

B. Glass

---

C. Plastic

---

D. Resin matrix

---

Glass

104 - In resorption of roots of the primary teeth, the dental pulp_____________?

---

A. Plays a passive role

---

B. Becomes a fibrotic non-vital mass

---

C. Initiates resorption from the inner surface of roots

---

D. Aids in formation of secondary dentin slowing down resorption

---

Plays a passive role

105 - In the majority of situations, that first decidous tooth to erupt is the____________?

---

A. Mandibular central incisor

---

B. Mandibular first molar

---

C. Maxillary central incisor

---

D. Maxillary second molar

---

Mandibular central incisor

106 - In type II gold alloys _______ Karat gold is used?

---

A. 24 K

---

B. 22 K

---

C. 18 K

---

D. 10 K

---

18 K

107 - Increased amount of powder in zinc phosphate cement mixture will cause_______________?

---

A. Decreased strength

---

B. Decreased film thickness

---

C. Decreased solubility

---

D. Increased setting time

---

Decreased solubility

108 - Inorganic content of cementum is_____________?

---

A. Less than bone

---

B. More than bone

---

C. Equal to that of bone

---

D. More than that of enamel

---

Less than bone

109 - Inorganic content of cementum is______________?

---

A. 45 to 50%

---

B. 50 to 55%

---

C. 55 to 60%

---

D. 60 to 65%

---

45 to 50%

110 - Inter globular dentin results due to_____________?

---

A. Failure of coalescence of calcospherities

---

B. Fracture of the dentin

---

C. Artifact in light microscopy

---

D. Disturbance in dentinal tubules

---

Failure of coalescence of calcospherities

111 - Intermediate cemental layer_____________?

---

A. Does not exhibit features of either dentin of cementum

---

B. Predominantly seen in apical tow thirds of roots of molars and premolars and is rare in incisors or deciduous teeth

---

C. Represents area of entrapment of hertwig's sheath in dentin or cementum

---

D. All of the above are correct

---

All of the above are correct

112 - Intermediate cementum is___________?

---

A. Between enamel and cementum

---

B. Found at dentinocemental junction

---

C. Apical third

---

D. Coronal third

---

Found at dentinocemental junction

113 - Intermediate cementum is____________?

---

A. Highly defined cellular zone near cemento – dentinal junction (CDJ)

---

B. Highly defined fibrillar zone near CDJ

---

C. Poorly defined zone near cemento-dentinal junction

---

D. Both a and B

---

Poorly defined zone near cemento-dentinal junction

114 - Korffs fibres are seen in______________?

---

A. Mantle dentin

---

B. Secondary dentin

---

C. Reactionary dentin

---

D. Indeed dermal tubules

---

Mantle dentin

115 - Lip furrow band is______________?

---

A. Vestibular lamina

---

B. Successional lamina

---

C. Dental lamina

---

D. Basal lamina

---

Vestibular lamina

116 - Machineable glass ceramic is________________?

---

A. Cerestore

---

B. Decor MGC

---

C. Infusium

---

D. Leucite

---

Decor MGC

117 - Matrix vesicles_______________?

---

A. Are found in mantle dentin

---

B. Contain collagen

---

C. Produce alkaline phosphatase

---

D. Inhibit mineralization

---

Are found in mantle dentin

118 - Maximum fluoride content is seen in_____________?

---

A. Dental cementum

---

B. Dental pulp

---

C. Enamel

---

D. Dentin

---

Dental cementum

119 - MEchanism of adhesion of GIC restoration with tooth surface is by mean of ______________?

---

A. Carboxyl group

---

B. Chelates with Metal Ions

---

C. C=C double bond

---

D. Polymer chains

---

Carboxyl group

120 - Membrana performative is seen in_________________?

---

A. Bell stage

---

B. Cap stage

---

C. Bud stage

---

D. Advanced bell stage

---

Bell stage

121 - Mesiodistal width is more than cervico- incisal length of crown in_____________?

---

A. Permanent central incisors

---

B. Decidous maxillary central incisors

---

C. Permanent maxillary canines

---

D. Permanent mandibular lateral incisors

---

Decidous maxillary central incisors

122 - Minimum thickness for type I zinc phosphate cement should be_______________?

---

A. 15 microns

---

B. 25 microns

---

C. 50 microns

---

D. 100 microns

---

25 microns

123 - Mirgration of odontoblasts into dentinal tubules occurs during ________________?

---

A. Cavity preparation

---

B. Dehydration

---

C. Water irrigation

---

D. None of the above

---

Cavity preparation

124 - Mode of failure during dislodgement of prosthesis cemented with zinc poly carboxylate cement is usually seen at the_____________?

---

A. Cement tooth interface

---

B. Cement prosthesis interface

---

C. Cleavage through the cement layer

---

D. Fracture of tooth or prosthesis

---

Cement prosthesis interface

125 - Morphological stages of tooth development are explained based on_____________?

---

A. Shape of enamel organ

---

B. Shape of tooth germ

---

C. Function of enamel organ

---

D. Shape of dental papilla

---

Shape of tooth germ

126 - Most preferable cement for temporary restoration______________?

---

A. GIC

---

B. ZOE

---

C. Ca (OH)2

---

D. Zinc polycarboxylate cement

---

ZOE

127 - Movement of tooth to close the intermaxillary gap during eruption is due to____________?

---

A. Physiological tooth migration

---

B. Active eruption

---

C. Passive eruption

---

D. None of the above

---

Active eruption

128 - Nutrition for ameloblasts after 1st layer of enamel is laid is______________?

---

A. Dental sac

---

B. Odontoblastic process

---

C. Ree

---

D. Dental Papilla

---

Dental sac

129 - One of the following statement is unique about circumpulpal dentine______________?

---

A. Collagen fibers are oriented perpendicular to DEJ

---

B. Vonkorff fibers are present

---

C. Contain phosphophoryn

---

D. Requires matrix vesicle for mineralization

---

Contain phosphophoryn

130 - Opaque porcelain________________?

---

A. Is Feldspathic glass

---

B. Contains opacifier like zirconium and titanium oxide

---

C. Not used to mask the colour of the cement used in placing of restoration

---

D. Used to produce the characteristic translucence, which is an inherent aspect of the incisal edge in natural teeth

---

Contains opacifier like zirconium and titanium oxide

131 - Oral tissue for microscopic examination is prepared by_______________?

---

A. Embedded in paraffin and sectioned

---

B. Embedded in paradion and sectioned

---

C. Frozen and sectioned

---

D. All of the above

---

All of the above

132 - Order of development of tooth germ is____________?

---

A. Bell-bud-cap

---

B. Cap-bell-bud

---

C. Bud-cap-bell

---

D. Bell-cap-bud

---

Bud-cap-bell

133 - Organic portion can be separated from the mineral by_____________?

---

A. Incineration/organic chelation

---

B. Decalcification

---

C. Devitrification

---

D. Combustion

---

Incineration/organic chelation

134 - Osteoblasts appear basic gram staining due to______________?

---

A. Increased ribonucleic acid

---

B. Acidic ground substance

---

C. Increased mitochondria

---

D. Presence of basic ground substance

---

Increased ribonucleic acid

135 - Outer and inner enamel epithelium first seen in____________?

---

A. Bud stage

---

B. Advanced bell stage

---

C. Cap stage

---

D. Bell stage

---

Cap stage

136 - Percentage of zinc in ZOE cement is__________________?

---

A. 0.6

---

B. 0.7

---

C. 0.8

---

D. 0.9

---

0.7

137 - pH of fully set zinc phosphate______________?

---

A. 44989

---

B. 45021

---

C. 45084

---

D. 45115

---

45084

138 - PH of polycarboxylate liquid is____________?

---

A. 5

---

B. 7

---

C. 8

---

D. 1.7

---

1.7

139 - PH of which cement remain below 7 even after 1 month after insertion into the cavity ?

---

A. Glass Ionomer Cement

---

B. Zinc Phosphate

---

C. Resin cement

---

D. Silicate cement

---

Silicate cement

140 - Phenomenon in which porcelain appears different under varying light condition is______________?

---

A. Translucency

---

B. Refractive optics

---

C. Metamerism

---

D. Opacification

---

Metamerism

141 - Physically and chemically, the dentin is closely related to______________?

---

A. Bone

---

B. Acellular cementum

---

C. Enamel

---

D. None of the above

---

Bone

142 - Pitting of direct filling old restoration usually results from_________________?

---

A. Using contaminated gold foil

---

B. Poor finished preparation

---

C. Improper stepping of condenser point

---

D. Using small condenser point

---

Improper stepping of condenser point

143 - Polycarboxylate cement is used for_____________?

---

A. Temporary restoration

---

B. Leuting

---

C. Permanent restoration

---

D. Die material

---

Leuting

144 - Porcelain binds to metal in PFM crown by_________________?

---

A. Metallic bind

---

B. Transparency

---

C. Chemical bond

---

D. B and C

---

B and C

145 - Porcelain denture teeth________________?

---

A. Have a higher coefficient of thermal expansion than acrylic teeth:

---

B. Have a lower abrasion resistance than enamel

---

C. Should be used where the inter dental clearance is small

---

D. Have a higher abrasion resistance than gold

---

Have a higher abrasion resistance than gold

146 - Porcelain is best fired__________________?

---

A. In open air

---

B. Under air compression

---

C. When several layer are fired simultaneously

---

D. Under minimum pressure

---

Under air compression

147 - Porosity in porcelain at condensation stage depends on_________________?

---

A. Shape and size of particle

---

B. Uniform distribution of particle size

---

C. Number of particles

---

D. None of the above

---

Shape and size of particle

148 - Porosity in porcelain can be prevented by_______________?

---

A. Thoroughness of condensation

---

B. Rapidity of firing

---

C. High firing temperature

---

D. All of the above

---

Thoroughness of condensation

149 - Powdered gold is___________________?

---

A. Made by a combination of chemical precipitation and atomization

---

B. Made by electrolytic precipitation

---

C. Made by beating pure gold at high temperatures

---

D. Made by milling pure gold ingots

---

Made by a combination of chemical precipitation and atomization

150 - Primary dentition period is______________?

---

A. From birth to 11 years

---

B. From 6 months to 11 years

---

C. From 6 months to 6 years

---

D. From 6 years to 11 years

---

From 6 months to 6 years

151 - Primary teeth differ from permanent teeth in following aspects ?

---

A. Thickness of enamel and dentin

---

B. Pulp chambers are longer

---

C. Roots are flaring

---

D. All of the above

---

All of the above

152 - Pulp chambers and roots canals in decidous teeth______________?

---

A. Wide and deep

---

B. Shallow and narrow

---

C. Wide and narrow

---

D. Shallow and wide

---

Shallow and wide

153 - Pyroplastic flow of porcelain is due to___________________?

---

A. High temperature during glazing

---

B. Low temperature during glazing

---

C. Improper condensation

---

D. High firing temperature

---

High temperature during glazing

154 - Quartz is Dental porcelain is______________?

---

A. Strengthener

---

B. Binder

---

C. Pigment

---

D. Crack minimzer

---

Strengthener

155 - Reestablishing the former outline of the root surface is_____________?

---

A. Anatomic repair

---

B. Functional repair

---

C. Physiological repair

---

D. Hyperplasia

---

Anatomic repair

156 - Regarding teeth which statement is wrong ?

---

A. Enamel is harder than dentine

---

B. Enamel has no cells

---

C. Ameloblast secrete enamel and dentine

---

D. Odontoblast produce dentin

---

Ameloblast secrete enamel and dentine

157 - Resorption of dental tissue is caused by_____________?

---

A. Osteoclasts

---

B. Osteoblasts

---

C. Odontoclasts

---

D. Odontoblasts

---

Odontoclasts

158 - Resorption of root of primary incisors starts at_____________?

---

A. 4 yrs

---

B. 6 yrs

---

C. 8 yrs

---

D. 10 yrs

---

4 yrs

159 - Root lengthening is contributed by____________?

---

A. Cellular cementum

---

B. Acellular cementum

---

C. Intermediate cementum

---

D. All of the above

---

Cellular cementum

160 - Roots of primary and secondary teeth are different in that the primary roots are more divergent and flaring. The other difference _____________?

---

A. Primary roots show less a accessory and lateral canals

---

B. Primary roots resorb more easily

---

C. Primary roots are shorter

---

D. None of the above

---

Primary roots show less a accessory and lateral canals

161 - S shape of dentinal tubules is due to______________?

---

A. Incremental deposition

---

B. Peritubular dentin

---

C. Crowding of odontoblasts

---

D. Due to excess amount of organic component

---

Crowding of odontoblasts

162 - Sclerotic dentin has following features_____________?

---

A. Caries susceptible

---

B. Insensitive

---

C. Hypersensitive

---

D. Resistant to caries

---

Resistant to caries

163 - Secondary caries is least likely seen with_______________?

---

A. Silicate cement

---

B. Zinc phosphate

---

C. Polycarboxylate

---

D. GIC

---

Silicate cement

164 - Secondary cementum is generally confined to_____________?

---

A. Cervical third of the root

---

B. Middle third of the root

---

C. Apical third of the root

---

D. No secondary cementum forms

---

Apical third of the root

165 - Shape of crown and the size of the roots is determined by______________?

---

A. Pulp

---

B. Dentin

---

C. Enamel

---

D. Cementum

---

Dentin

166 - Silicate cement is indicated in________________?

---

A. Mouth breathers

---

B. Patients with high caries index

---

C. In the restoration of posterior tooth

---

D. None of the above

---

Patients with high caries index

167 - Specific stain for fat cells is___________?

---

A. Eosin & haematoxylin

---

B. Carbol fuschin

---

C. Sudan III

---

D. Cresyl violet

---

Sudan III

168 - Stage recognized in the firing of dental porcelain given below. Which of state is not correct ?

---

A. Cold stage bisque

---

B. Low bisque

---

C. Medium bisque

---

D. High bisque

---

Cold stage bisque

169 - Stellate reticulum is seen in______________?

---

A. Dental lamina

---

B. Enamel organ

---

C. Hertwig's root sheath

---

D. All of the above

---

Enamel organ

170 - Strength of zinc phosphate is effected by_______________?

---

A. Temp of glass slab

---

B. P:L ratio

---

C. Consistency of mix

---

D. Alteration of mixing time

---

P:L ratio

171 - Super abrasive is________________?

---

A. Sand

---

B. Silicon arbide

---

C. Diamond

---

D. Aluminum oxide

---

Diamond

172 - Teeth with out antagonist if erupt is called____________?

---

A. Stable

---

B. Over erupted

---

C. Supra erupted

---

D. Submerged

---

Supra erupted

173 - Temporary structures in enamel organ are (before enamel formation) ?

---

A. Enamel knot

---

B. Enamel cord

---

C. Both A and B

---

D. Enamel Cuticle

---

Both A and B

174 - The addition of which of the following can accelerate the setting time of zinc oxide cement_____________?

---

A. Zinc acetate

---

B. Barium sulphate

---

C. Zinc sulphate

---

D. Barium chloride

---

Zinc acetate

175 - The apical foramen of a fully developed permanent tooth is usually lined by_____________?

---

A. Dentin

---

B. Cementum

---

C. Epithelial rest cells

---

D. The Epithelial diaphragm

---

Cementum

176 - The average diameter of coronal dentinal tubules near the pulp is____________?

---

A. 0.2-0.5 microns

---

B. 2-3 microns

---

C. 0.2-0.3 microns

---

D. 7 microns

---

2-3 microns

177 - The average life of silicate cement restoration is______________?

---

A. 2 years

---

B. 4 years

---

C. 6 years

---

D. 8 years

---

4 years

178 - The best tissue tolerated material for crown and bridge_______________?

---

A. Highly polished porcelain

---

B. Highly polished acrylic

---

C. Highly glazed porcelain

---

D. Highly polished metal

---

Highly glazed porcelain

179 - The bud, cap and bell stage of the developing tooth are based, on growth of the______________?

---

A. Stellate reticulum

---

B. Dental papilla

---

C. Enamel organ

---

D. Dental sac

---

Enamel organ

180 - The cap stage in tooth development is characterized by_____________?

---

A. morphodifferentiation

---

B. reversal of functional polarity

---

C. Formation of hammock ligament

---

D. Increased mitotic activity

---

Increased mitotic activity

181 - The carat for Au foil used for restorations is_______________?

---

A. 18

---

B. 20

---

C. 22

---

D. 24

---

24

182 - The cavity varnish applied reduces post operative sensitivity in amalgam restoration by____________?

---

A. Decreasing conduction of heat to pulp

---

B. Minimize marginal leakage around restoration

---

C. By altering the chemical composition of restoration materials

---

D. By preventing penetration of corrosion products into the dentinal tubules

---

Minimize marginal leakage around restoration

183 - The cells of the enamel organ which differentiate into future ameloblasts are_____________?

---

A. Cells of inner enamel epithelium

---

B. Cells of outer enamel epithelium

---

C. Cells of stellate reticulum

---

D. Cells of stratum intermedium

---

Cells of inner enamel epithelium

184 - The cells that form secondary dentin are_______________?

---

A. Cementoblasts

---

B. Fibroblasts

---

C. Odontoblasts

---

D. Osteoblasts

---

Odontoblasts

185 - The cells, which are responsible for removal of bone matrix in bone resorption, are_____________?

---

A. Osteoblast

---

B. Fibrocytes

---

C. Polymorphs

---

D. Osteoclasts

---

Osteoclasts

186 - The cement Which is least soluble in oral cavity______________?

---

A. Glass ionomer

---

B. Resin cement

---

C. Polycarboxylate cement

---

D. Silico-Phosphate cement

---

Resin cement

187 - The cementuoenamel junction is approximately at the level at which the root canal becomes_____________?

---

A. Twisted

---

B. Curved

---

C. Pulp chamber

---

D. Lateral canal

---

Pulp chamber

188 - The chief advantage of zinc phosphate cement is its___________?

---

A. Good compressive strength

---

B. Film thickness

---

C. Lack of irritation

---

D. Low solubility

---

Film thickness

189 - The cohesive gold used as bulk filler is_____________?

---

A. Electra alloy

---

B. Mat gold

---

C. Spherical gold

---

D. Gold foll

---

Mat gold

190 - The components of future TMJ shows development at_____________?

---

A. 6 weeks

---

B. 18 weeks

---

C. 10 weeks

---

D. 16 weeks

---

10 weeks

191 - The crowns and roots of primary molar at their cervical portions are more____________?

---

A. Slender mesiodistally

---

B. Slender anteroposteriorly

---

C. Bulkier mesiodistally

---

D. Buliker anteroposteriorly

---

Slender mesiodistally

192 - The deciduous teeth can be differentiated from permanent teeth by_____________?

---

A. Enamel prismatic arrangement

---

B. Dentinal tubule arrangement

---

C. Primary and secondary dentin

---

D. Mineral content

---

Enamel prismatic arrangement

193 - The dentin adjacent to the dentinoenamel junction is called the______________?

---

A. Mantle dentin

---

B. Circumpulpal dentin

---

C. Predentin

---

D. Secondary dentin

---

Mantle dentin

194 - The dentin receptors are unique because_____________?

---

A. They elicit pain to hot and cold

---

B. They elicit pain to touch and pressure

---

C. They elicit pain to chemicals

---

D. Elicit only pain as a response

---

Elicit only pain as a response

195 - The direction of enamel rods in decidous teeth is_____________?

---

A. Same as permanent teeth

---

B. Inclined in an apical direction in the cervical third of crown

---

C. Inclined in an occlusal direction in the cervical third of crown

---

D. None of the above

---

Inclined in an occlusal direction in the cervical third of crown

196 - The disturbances occurred during Calcification stage of tooth development is seen in_____________?

---

A. Peg laterals

---

B. Microdontia

---

C. Supernumerary tooth

---

D. Interglobular dentin

---

Interglobular dentin

197 - The dual cure cements should not be used with light transmitting prostheses thicker than____________?

---

A. mm

---

B. 1.5 mm

---

C. mm

---

D. 2.5 mm

---

2.5 mm

198 - The effect of zinc oxide-eugenol on the pulp ?

---

A. Is irritating

---

B. Encourages pulpal fibrosis

---

C. Is sedating

---

D. Has no effect

---

Is sedating

199 - The first porcelain tooth material was introduced by______________?

---

A. DeChemant

---

B. Ash

---

C. Plateau

---

D. McClean

---

DeChemant

200 - The first sign of future deciduous teeth as a thickening of oral ectoderm appears at about_____________?

---

A. 25th day of Intra uterine life

---

B. 34th day of Intra uterine life

---

C. 56th day of Intra uterine life

---

D. 20 wks of Intra uterine life

---

56th day of Intra uterine life

201 - The formation of the dental lamina is initiated by______________?

---

A. Forebrain

---

B. Rathke's pouch

---

C. Neural crest cells

---

D. Odontoblasts

---

Neural crest cells

202 - The formation of which of the following does not represent normal physiologiacl process of dentin formation_______________?

---

A. Primary and secondary dentin

---

B. Secondary dentin and circumpulpal dentin

---

C. Tetiary dentin and sclerotic dentin

---

D. All of the above

---

Tetiary dentin and sclerotic dentin

203 - The hertwig's epithelial root shealth is essential to development of the root because it_______________?

---

A. Gives rise to cementoblasts that produce cementum of the root

---

B. Moulds the shape of roots and stimulates differentiation of odontoblasts

---

C. Given rise to odontoblasts that lay down dentin of the root

---

D. Remians as an essential constituents of the periodontal ligament

---

Moulds the shape of roots and stimulates differentiation of odontoblasts

204 - The highest ( longest ) and sharpest cusp on the decidous mandibular first molar is____________?

---

A. Mesiolingual

---

B. Distolingual

---

C. Mesiobuccal

---

D. Distobuccal

---

Mesiolingual

205 - The ideal temperature of water bath for softening fluid wax is about________________?

---

A. 51 to 54 degree F

---

B. 51 to 54 degree C

---

C. 70 to 75 degree F

---

D. 70 to 75 degree C

---

51 to 54 degree C

206 - The largest mesiodistal diameter in primary dentition is____________?

---

A. Mandibular 1st molar

---

B. Mandibular2nd molar

---

C. Maxillary 2nd molar

---

D. None of the above

---

Mandibular2nd molar

207 - The logical explanation for the unique anticariogenic property of most silicate cements is______________?

---

A. The reduction in enamel solubility due to fluoride uptake by enamel

---

B. That beryllium flux is used in silicates

---

C. That silicates show very little leakage at the margins of the restoration

---

D. Due to the high silica content

---

The reduction in enamel solubility due to fluoride uptake by enamel

208 - The main bulk of dentin is formed by______________?

---

A. Peritubular dentin

---

B. Mantle dentin

---

C. Inter tubular dentin

---

D. Predentin

---

Inter tubular dentin

209 - The main components is sillicophosphate cement________________?

---

A. Zinc phosphate and GIC

---

B. Silicate and GIC

---

C. ZOE and Silicate

---

D. Zinc phosphate and SIlicate

---

Zinc phosphate and SIlicate

210 - The main purpose of adding metallic oxides in ceramic is________________?

---

A. Colour matching

---

B. Transparency

---

C. Opacity

---

D. None of the above

---

Colour matching

211 - The major component of zinc phosphate cement is_____________?

---

A. Zinc oxide

---

B. Phosphoric acid

---

C. Zinc

---

D. None of the above

---

Zinc oxide

212 - The malleting force is directed______________?

---

A. Perpendicular to the walls

---

B. Parallel to long axis of crown

---

C. 45° to the wall

---

D. None of the above

---

45° to the wall

213 - The material used in its pure form in dentistry is______________?

---

A. Composite

---

B. Silver

---

C. Gold

---

D. Amalgam

---

Gold

214 - The maximum rate of eruption, as the tooth cusps reach the surface epithelium is around ________ μm/day?

---

A. 100

---

B. 75

---

C. 50

---

D. 25

---

75

215 - The maximum shrinkage during firing proces in ceramic occurs in__________________?

---

A. High Bisque stage

---

B. Low Bisque stage

---

C. Medium Bisque stage

---

D. Fusion stage

---

Medium Bisque stage

216 - The melting point of titanium is __________ degree celsius?

---

A. 1056

---

B. 1560

---

C. 1668

---

D. 1886

---

1668

217 - The microhardness of dentin is about____________?

---

A. 1/2 that of enamel

---

B. 1/7 that of enamel

---

C. 1/4 that of enamel

---

D. 1/5 that of enamel

---

1/4 that of enamel

218 - The most accepted theory for dentin sensitivity is: or Which of the following is the most accepted theory of transmission of dental sensation_____________?

---

A. Transduction theory

---

B. Direct neural stimulation

---

C. Hydrodynamic theory

---

D. Hydrostatic theory

---

Hydrodynamic theory

219 - The most accepted theory of tooth eruption is____________?

---

A. Hydrodynamic theory

---

B. Clone theory

---

C. Periodontal ligament traction theory

---

D. Vascular theory

---

Periodontal ligament traction theory

220 - The most commonly used, most biocompatible and adhesive cement is______________?

---

A. Zinc phosphate

---

B. Zinc oxide eugenol

---

C. Calcium hydroxide

---

D. Glass ionomer

---

Glass ionomer

221 - The most toxic form of mercury is_________________?

---

A. Methyl and ethyl mercury

---

B. Mercury vapour

---

C. Inorganic mercury forms

---

D. Mercury sulphide

---

Methyl and ethyl mercury

222 - The opacity in ceramics is achieved by adding_______________?

---

A. Boric oxide

---

B. Copper oxide

---

C. Silica

---

D. Titanium oxide

---

Titanium oxide

223 - The organic lining of the calcified dentinal tubules is known as_______________?

---

A. Lamina propria

---

B. Lamina lucida

---

C. Lamina limitans

---

D. Lamina densa

---

Lamina limitans

224 - The pain transmission through dentin is______________?

---

A. Direct neural stimulation

---

B. Fluid or hydrodynamic theory

---

C. Transduction theory

---

D. All of the above

---

All of the above

225 - The preferred material for repair of fractured denture base is______________?

---

A. Chemically cure resin

---

B. Heat curve resin

---

C. Light cure resin

---

D. Vinyl resin

---

Chemically cure resin

226 - The primary lateral incisors begin to calcify about the_____________?

---

A. 4th month of life

---

B. 4th month in utero

---

C. 41/2 month in utero

---

D. 5th month in utero

---

41/2 month in utero

227 - The primary teeth that present the most outstanding morpholgic deviations from permanent teeth are______________?

---

A. Central incisors

---

B. Mandibular first molar

---

C. Mandibular second molar

---

D. Canines

---

Mandibular first molar

228 - The principal constituent of set silicate cement matrix is_______________?

---

A. Hydrated Aluminium phosphate

---

B. Hydrated Aluminium Phosphate with calcium fluoride

---

C. Hydrate Aluminosilicate gel

---

D. Hydrated Aluminium phosphate crystal, CAF2 alluminosiliate gel

---

Hydrated Aluminium phosphate crystal, CAF2 alluminosiliate gel

229 - The principle application of zinc phosphate cement is_____________?

---

A. In final cementation

---

B. As temporary cementation

---

C. As a temporary filling material

---

D. It has less occlusal wear

---

In final cementation

230 - The pulp of first primary molar contains________________?

---

A. Four pulp horn and three root canal

---

B. Three pulp horn and three root canal

---

C. Two pulp horn and two root canal

---

D. Two pulp horn and three root canal

---

Four pulp horn and three root canal

231 - The pure form of gold used in dentistry is known as___________________?

---

A. Cohesive gold

---

B. Non cohesive gold

---

C. Class I casting gold

---

D. Class IV casting gold

---

Cohesive gold

232 - The region in which cementum formation is most rapid is_____________?

---

A. Middle

---

B. Coronal

---

C. Apical

---

D. Interradicular

---

Middle

233 - The relationship between the pulpal and periodontal tissue complex begins during dental development at_____________?

---

A. Adolescent stage

---

B. 5-10 years

---

C. Embryonic stage

---

D. None of the above

---

Embryonic stage

234 - The setting of zinc phosphate is accelerated by_____________?

---

A. Adding a drop of water

---

B. Increasing mixing time

---

C. Cooling the slab

---

D. Adding a drop of oleic acid

---

Adding a drop of water

235 - The setting of zinc phosphate may be retarded by ?

---

A. Increased in the ratio of powder to liquid

---

B. Diluting the liquid with water

---

C. Increase the addition of powder to liquid

---

D. Decrease the addition of powder to liquid

---

Decrease the addition of powder to liquid

236 - The setting time of ZnPO4 cement can be retarded by_____________?

---

A. mixing more powder to the liquid

---

B. mixing powder to liquid, checked by water

---

C. slower addition of powder to liquid

---

D. faster addition of powder to liquid

---

slower addition of powder to liquid

237 - The sharpest cusp of primary first molar tooth is____________?

---

A. Mesiobuccal

---

B. Distobuccal

---

C. Mesiolingual

---

D. Distolingual

---

Mesiolingual

238 - The successors of deciduous teeth develops form_______________?

---

A. Successional lamina

---

B. Dental lamina

---

C. Stellate reticulum

---

D. Neutral ectodermal cells

---

Successional lamina

239 - The temperature (in °F) of the mixing slab for silicate cements should be_____________?

---

A. 55 – 65

---

B. 65 – 75

---

C. 75 – 85

---

D. 85 – 95

---

65 – 75

240 - The tow cements which hold with the tooth are_______________?

---

A. GIC and polycarboxylate

---

B. GIC and ZnPO4

---

C. ZnPO4 and silicate

---

D. GIC and silicate

---

GIC and polycarboxylate

241 - The type of dentin that is formed prior to root completion______________?

---

A. Inter tubular dentin

---

B. Peritubular dentin

---

C. Circum pulpal dentin

---

D. Secondary dentin

---

Circum pulpal dentin

242 - The type of tertiary dentin which contains cellular inclusions is found in_____________?

---

A. Sclerotic dentin

---

B. Mantle dentin

---

C. Predentin

---

D. Osteodentin

---

Osteodentin

243 - The zone of dentin most recently formed and uncalcified is known as____________?

---

A. Mantle dentin

---

B. Circumpulpal dentin

---

C. Predentin

---

D. Secondary dentin

---

Predentin

244 - Thermal conductivity of which material is close to dentin____________?

---

A. Amalgam

---

B. Silicate

---

C. Composite resin

---

D. Cavity varnish

---

Silicate

245 - Thickness of luting cement is_____________?

---

A. 20-40μ

---

B. 10-20μ

---

C. 60-80μ

---

D. 1-2μ

---

20-40μ

246 - To prevent porosity in dental porcelain it should be backed________________?

---

A. Boric oxide

---

B. In vacuum

---

C. For long period

---

D. Under pressure

---

In vacuum

247 - Tome's firbres are____________?

---

A. With out but not with in the dentin

---

B. Odontoblastic processes in dental tubules

---

C. Type of sharpey's fibres

---

D. Originate from tome's granular layer

---

Odontoblastic processes in dental tubules

248 - Tooth buds of permanent mandibular incisors are situated_____________?

---

A. Lingual to primary teeth

---

B. Inferior to primary teeth

---

C. Labial to primary teeth

---

D. A and B

---

A and B

249 - Tooth develops from_______________?

---

A. Ectoderm, mosoderm

---

B. Ectoderm

---

C. Mesoderm

---

D. Ectoderm and endoderm

---

Ectoderm, mosoderm

250 - Tooth eruption is due to______________?

---

A. Osteoclastic activity

---

B. Proliferation of cells at crypt

---

C. Exforliation of primary tooth

---

D. Eruptive force

---

Eruptive force

251 - Torsional force is_______________?

---

A. Compression

---

B. Tensile force

---

C. Shear

---

D. Transverse bending force

---

Shear

252 - Transmission of stimulus across dentin is______________?

---

A. Direct activation of nerve endings

---

B. Correlated with the innervation density of the dentin

---

C. Stimulus induced fluid flow

---

D. There is no transmission of stimulus across dentin

---

Stimulus induced fluid flow

253 - Transverse ridge is prominent on occlusal surface of which of the following decidous teeth ?

---

A. Mandibular first molar

---

B. Maxillary first molar

---

C. Mandibular second molar

---

D. Maxillary second molar

---

Mandibular first molar

254 - Trauma or excessive occlusal forces causes_____________?

---

A. Hyperplasia of cementum

---

B. Hypertrophy of cementum

---

C. Resorption of cementum

---

D. None of the above

---

Resorption of cementum

255 - What is the thickness of the layer of primsless enamel found in primary teeth_____________?

---

A. 25 μm

---

B. 50μm

---

C. 75μm

---

D. 100μm

---

25 μm

256 - What is the working time of zinc polyacrylate cement ?

---

A. 1 Minutes

---

B. 2 Minutes

---

C. 3 Minutes

---

D. 4 Minutes

---

3 Minutes

257 - When Gold fused with porcelain is fired at very high temperature greenish discoloration of cervical margin is due to________________?

---

A. High firing temperature

---

B. Disintegration of opaque layer

---

C. Presence of copper

---

D. Formation of excess oxides

---

Presence of copper

258 - When porcelain is basked against metal, it should possess a________________?

---

A. high fusion expansion

---

B. high fusion temperature

---

C. linear coefficient of thermal expansion less than but close to that of metal

---

D. Linear coefficient of thermal expansion greater than, but close to that of the metal

---

linear coefficient of thermal expansion less than but close to that of metal

259 - When selection the colour of cement to use for cementing a porcelain jacket crown, the powder being tested is best mixed with______________?

---

A. Glycerin-water solution

---

B. Cement liquid

---

C. Alcohol

---

D. Only water

---

Glycerin-water solution

260 - When viewed occlusally, a primary mandibular second molar closely resembles which of the following mandibular teeth ?

---

A. Permanent second molar

---

B. Permanent first molar

---

C. Second premolar

---

D. Primary first molar

---

Permanent first molar

261 - Which among the following is NOT a common finding of the decidous dentition ?

---

A. Tight contacts, absence of spacing

---

B. Shallow overjet and overbite

---

C. Flush terminal plane

---

D. Ovoid arch form

---

Tight contacts, absence of spacing

262 - Which cement base has the highest modulus of elasticity ?

---

A. Zinc polycarboxylate

---

B. Polymer reinforced ZOE cement

---

C. Zinc phosphate

---

D. Glass inomer cement

---

Zinc phosphate

263 - Which cement is irritating to the pulp ?

---

A. Carboxylate cement

---

B. Zinc oxide-eugenol cement

---

C. Zinc phosphate

---

D. Ethoxybenzoic acid

---

Zinc phosphate

264 - Which component of zinc oxide-eugenol cement gives its strength ?

---

A. Rosin

---

B. Zinc oxide

---

C. Zinc acetate

---

D. Oil of cloves

---

Zinc oxide

265 - Which dental tissue doesn't contain nerves ?

---

A. Bone

---

B. Dentin

---

C. Cementum

---

D. Pulp

---

Cementum

266 - Which enzyme is associated with the mineralization_____________?

---

A. Acid phosphatase

---

B. Alkaline phosphatase

---

C. Adenosine triphosphate

---

D. Amino peptidase

---

Alkaline phosphatase

267 - Which glass ionomer cement develops early resistance to water intake on setting ?

---

A. Reinforced auto care glass ionomer cement

---

B. Compomer

---

C. Resin modified glass ionomer cement

---

D. Ceramic reinforced glass ionomer cement

---

Resin modified glass ionomer cement

268 - Which is not present in porcelain________________?

---

A. Silica

---

B. Feldspar

---

C. Calcium carbonate

---

D. Amorphous material

---

Amorphous material

269 - Which is the cement with adhesive properties ?

---

A. Zinc oxide eugenol

---

B. Zinc polycarboxylate

---

C. Glass ionomer

---

D. Both B & C

---

Both B & C

270 - Which of the areas of the tooth is most sensitive during cavity preparation ?

---

A. Enamel (anterior teeth)

---

B. Enamel (Posterior teeth)

---

C. Dentin

---

D. Dentinoenamel junction

---

Dentinoenamel junction

271 - Which of the following acts as accelerator in Zinc oxide eugenol______________?

---

A. ZnCl2 + Eugenol

---

B. ZnCl2 + ZnSO2

---

C. Eugenol + ZnO

---

D. Zn(OH)2 + ZnO

---

ZnCl2 + ZnSO2

272 - Which of the following anomalies occur during the initiation and proliferation of tooth development ?

---

A. Amelogenisis imperfecta

---

B. Dentinogenesis imperfecta

---

C. Enamel hypoplasia

---

D. Oligodontia

---

Oligodontia

273 - Which of the following bur is used in the preparation of cavity restored with porcelain fused to metal ?

---

A. Carbide bur

---

B. Diamond bur

---

C. Stainless steel bur

---

D. Diamond but for porcelain and carbide bur for metal

---

Diamond but for porcelain and carbide bur for metal

274 - Which of the following cements bonds to tooth structure, which has an anticariogenic effect, has a degree of translucency and does not irritate the pulp ?

---

A. Polycarboxylate cement

---

B. Resin cement

---

C. Silicate cement

---

D. Glass ionomer cement

---

Glass ionomer cement

275 - Which of the following cements have anti cariogenic properly________________?

---

A. ZOE

---

B. Calcium Hydroxide

---

C. Zinc silicophosphate

---

D. Zinc phosphate

---

Zinc silicophosphate

276 - Which of the following cements is contraindicated in mouth breathers_______________?

---

A. Silicate

---

B. ASPA

---

C. Polycarboxylate

---

D. Zinc phosphate

---

Silicate

277 - Which of the following cements is most biocompatible with pulp ?

---

A. GIC

---

B. Copper cement

---

C. Zinc phosphate cement

---

D. Zinc oxide eugenol cement

---

Zinc oxide eugenol cement

278 - Which of the following cements is most irritant to pulpal tissues ?

---

A. Zinc phosphate

---

B. Silicate

---

C. Glass ionomer

---

D. Polycarboxylate

---

Silicate

279 - Which of the following cements is most kind to pulp ?

---

A. Glass ionomer

---

B. Polycarboxylate

---

C. Silicate

---

D. Resin cement

---

Polycarboxylate

280 - Which of the following characterizes the silicate cement______________?

---

A. It is pulpal irritant

---

B. It is highly cariogenic

---

C. Chemically attaches to the tooth structure

---

D. It produces thinnest film surface

---

It is pulpal irritant

281 - Which of the following decidous molars bears the greatest resemblance to a premolar _____________?

---

A. Maxillary first

---

B. Maxillary second

---

C. Mandibular first

---

D. Mandibular second

---

Maxillary first

282 - Which of the following dentinal layers is more mineralized______________?

---

A. Peritubular dentin

---

B. Inter tubular dentin

---

C. Dentinal tubules

---

D. Circum pulpal dentin

---

Peritubular dentin

283 - Which of the following do polycarboxylate and GIC have in common ?

---

A. Polysiloxane

---

B. Phosphoric acid

---

C. Polyacrylic acid

---

D. Ion leachable glass

---

Polyacrylic acid

284 - Which of the following factors are primarily contributory to the shedding of deciduous tooth ?

---

A. Hydrostatic

---

B. Vascular pressure

---

C. Oncotic pressure

---

D. Masticatory pressure

---

Masticatory pressure

285 - Which of the following has the maximum faciolingual diameter of the crown__________?

---

A. Decidous maxillary 2nd molar

---

B. Decidous maxillary 1st molar

---

C. Decidous mandibular 2nd molar

---

D. Decidous mandibular 1st molar

---

Decidous maxillary 2nd molar

286 - Which of the following is a rare occurrence______________?

---

A. Enamel meet cementum at a point

---

B. Enamel overlaps cementum

---

C. Cementum overlaps enamel

---

D. Both never meet

---

Enamel overlaps cementum

287 - Which of the following is common to both zinc eugenol cement and polycarboxylate cement?

---

A. Polyacrylic acid is liquid

---

B. Chemical bond to tooth structure

---

C. Chelation

---

D. Substitution o eugenol by EBA to increase strength of cement

---

Chelation

288 - Which of the following is correct ?

---

A. Parotid – stenson's duct – pure serous

---

B. Submandibular – Wharton's duct – mixed and predominantly serous

---

C. Sublingual gland – bartholin's duct – mixed and predominantly mucous

---

D. All of the above

---

All of the above

289 - Which of the following is correct?

---

A. Roof of mandible contains thin, compact bone

---

B. Articular tubercle is composed of spongy bone covered with thin compact bone

---

C. Condyle contains red bone marrow

---

D. All of the above

---

All of the above

290 - Which of the following is correct?

---

A. Fibronectin helps in attachment of fibroblasts to collagen

---

B. Cementicles are found in periodontal ligament of order individuals

---

C. The large nerve fibres are myelinated and are concerned with discerment of touch

---

D. All of the above

---

All of the above

291 - Which of the following is correct?

---

A. Cementum is more resistant to resorption than bone

---

B. Bone is more resistant to resorption than cementum

---

C. Both are equally resorbable

---

D. None of the above

---

Cementum is more resistant to resorption than bone

292 - Which of the following is correct?

---

A. Reparative dentin is characterized by having fewer and more twisted tubules than normal dentin and may include odontoblasts

---

B. Dead tracts appear black in transmitted and white in reflected ligth

---

C. Sclerotic transparent dentin appears transparent or light in transmitted light and dark in reflected light

---

D. All of the above

---

All of the above

293 - Which of the following is correct?

---

A. Each rod is formed by 4 ameloblasts

---

B. Each ameloblast contributes to 4 different rods

---

C. Head of the rod is formed by one ameloblasts, and tail is formed by three other ameloblasts

---

D. All of the above

---

All of the above

294 - Which of the following is least mineralized ?

---

A. Cementoid

---

B. Incremental line

---

C. Cellular cementum

---

D. Acellular cementum

---

Cementoid

295 - Which of the following is most important in strength ZOE_____________?

---

A. Liquid powder ratio

---

B. Temperature of mixing stab

---

C. Speed of mixing

---

D. Addition of few drops of water

---

Liquid powder ratio

296 - Which of the following is not an ecto-mesenchymal derivative ?

---

A. Dentin

---

B. Cementum

---

C. Pulp

---

D. Enamel

---

Enamel

297 - Which of the following is not correct ?

---

A. In case of pituitary gigantis, all sinuses assume a larger volume than normal

---

B. In chronic infections, the pain may mimic neuralgia of dental origin

---

C. Malignant lesions of maxillary sinus produce their manifestations in maxillary teeth

---

D. None of the above

---

None of the above

298 - Which of the following is not correct?

---

A. Free denticles are entirely surrounded by pulp tissue(free of dentin)

---

B. Embedded denticles are entirely surrounded by dentin (embedded in dentin)

---

C. Attached denticles are partly fused with dentin

---

D. False denticles contains many dentinal tubules

---

False denticles contains many dentinal tubules

299 - Which of the following is not true___________?

---

A. Alveolar bone proper surrounds the root and gives attachment to fibres of periodontal ligament

---

B. supporting alveolar bone surrounds the alveolar bone proper and supports the socket

---

C. The cortical plates are thinner in maxilla than in mandible

---

D. They are thickest in anterior portion of jaw

---

They are thickest in anterior portion of jaw

300 - Which of the following is the main constituent of porcelain__________________?

---

A. Feldspar

---

B. Kaolin

---

C. Quartz

---

D. Clay

---

Feldspar

301 - Which of the following is true about direct filling gold______________?

---

A. Properly condensed mat gold has no voids

---

B. Whatever may be the type voids are inherent

---

C. Voids can be avoided with manual condensation

---

D. None of the above

---

Whatever may be the type voids are inherent

302 - Which of the following is true of cellular cementum ?

---

A. Forms during root formation

---

B. Forms after the eruption of the tooth

---

C. Seen at the coronal portion of the tooth

---

D. Formation is a slow process

---

Forms after the eruption of the tooth

303 - Which of the following is true?

---

A. Cutting cone or resorption tunnel is the area of resorption seen in alveolar bone

---

B. CAMP or cyclic adenosine monophosphate levels are increased on pressure side of bone and this results in bone resorption

---

C. Immature born / embryonic bone seen during fracture healing contains less calcified material and greater number of large osteocytes

---

D. All of the above

---

All of the above

304 - Which of the following is true?

---

A. Maxillary sinus communicates with environment through middle meatus and nasal vestibule

---

B. Maxillary sinus is four- sided pyramid

---

C. In most of the cases, the main ostium is present in posterior third of hiatus semilunar

---

D. All of the above

---

All of the above

305 - Which of the following is true___________?

---

A. Pulpal pressure is highest among body tissues

---

B. Majority of nerve that enter the pulp are non myelinated and are sympathetic in nature

---

C. Plexus of Rashkow or parietal layers of nerves is formed by network of peripheral axons located adjacent to cell rich zone

---

D. All of the above

---

All of the above

306 - Which of the following is true_____________?

---

A. All the bones of upper face develop by intra membranous ossification

---

B. Incus and malleus develops from mecketls cartilage

---

C. The third auditory ossicle or stapes develops from 2nd branchial arch

---

D. All of the above

---

All of the above

307 - Which of the following is true______________?

---

A. The uncalcified matrix of cementum is called cementoid

---

B. Cementum contain type I collagen predominantly

---

C. Cementodentinal junction is sometimes scallopes in deciduous teeth and smooth in permanent teeth

---

D. All of the above

---

All of the above

308 - Which of the following is wrong?

---

A. The architecture of type I spongiosa is seen in mandible

---

B. Type II spongiosa is seen in maxilla

---

C. Condylar process & angle in mandible, and tuberosity in maxilla contain hemopoietic cellular marrow

---

D. Bundle bone contains a lesser amounts of calcium salts than other types of bony tissue

---

Bundle bone contains a lesser amounts of calcium salts than other types of bony tissue

309 - Which of the following releases single wavelength of energy ?

---

A. QTH

---

B. PAC

---

C. LED

---

D. Argon lasers

---

Argon lasers

310 - Which of the following show chemical bond with enamel (Calcified tissues)______________?

---

A. Composites

---

B. Direct filling resins

---

C. Polycarboxylate cements

---

D. BIS-GMA resins in pit and fissure sealants

---

Polycarboxylate cements

311 - Which of the following statement is correct?

---

A. Enamel cannot form in absence of dentin

---

B. The formation of enamel and dentin are independent of each other

---

C. Enamel formation can occur in absence of dentin

---

D. None of the above

---

Enamel cannot form in absence of dentin

312 - Which of the following statement is true______________?

---

A. Cementum is thinnest at CEJ (20-50μm)

---

B. Cementum is thickest towards the apex (150-200μm)

---

C. The apical foramen is surrounded by cementum

---

D. All of the above

---

All of the above

313 - Which one of the following dental cement accelerates the formation of reparative dentin ?

---

A. Eugenol

---

B. Calcium Hydroxide

---

C. Zinc oxide

---

D. Silica

---

Calcium Hydroxide

314 - Which one of the following dental cements does not contain water as part of the composition of the liquid component ?

---

A. Zinc Phosphate cement

---

B. Zinc oxide equgenol cement

---

C. Zinc silicophosphate cement

---

D. Zinc polycarboxylate cement

---

Zinc oxide equgenol cement

315 - Which one of the following restorative materials is having coefficient of thermal expansion close to that of tooth enamel and dentin ?

---

A. Microfilled composite resins

---

B. Pure gold

---

C. Silver amalgam

---

D. Type II Glass ionomer cement

---

Type II Glass ionomer cement

316 - Which statement is correct about decidous dentition?

---

A. Calcification of maxillary primary first premolar is completed at birth

---

B. Mandibular first molar erupts at one and half years of age

---

C. The crowns of primary dentition are more yellowish than permanent

---

D. The primary dentition is initiated at 10th month in uterus

---

Mandibular first molar erupts at one and half years of age

317 - Which type of collagen fibers demonstrates Chicken wire configuration ?

---

A. Type I

---

B. Type II

---

C. Type III

---

D. Type IV

---

Type IV

318 - Why GIC is best restorative material in children_____________?

---

A. High strength

---

B. Good marginal integrity

---

C. It can bond enamel & dentin

---

D. It has less occlusal wear

---

It can bond enamel & dentin

319 - With respect to their permanent successors the sum of the mesidodistal diameters of the first and second decidous molar is generally ____________?

---

A. Less

---

B. Greater

---

C. The same

---

D. Not related

---

Greater

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