Dental Anatomy and Histology

8/3/2019 Dental Anatomy and Histology

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9. The most mineralised part of dentine isA. Peritubular dentine

13. The percentage of total dentine surface dentinal tubules makein 0.5mm away from pulp is

A. 20%B. 50%

14. The junction between primary and secondary dentine isA. A reversal lineB. Sharp curvatureC. A resting lineD. A reduction in the number of tubules

15. What is the correct sequence of eventsA. Differentiation of odontoblast, elongation of enamel epithelium,

dentine formation then enamel formation.B. Differentiation of odontoblast, dentine formation then enamelformation, elongation of enamel epithelium.C. Elongation of enamel epithelium, differentiation of odontoblast,dentine formation then enamel formation.

18. In which direction does the palatal root of the upper first molar usually curvetowardsA. Facial / buccal/B. LingualC. Mesial

D. Distal

64. Which of the following anomalies occurs during the initiation and proliferationstages of tooth developmentA. Amelogenesis imperfectaB. Dentinogenesis imperfectaC. Enamel hypoplasiaD. OligodontiaE. Ankylosis

65. Which is the right sequence of the histological stages of tooth development

A. Initiation, proliferation, histodifferentiation, morphodifferentiation, mineralizationB. Proliferation, initiation, histodifferentiation, morphodifferentiation, mineralizationC. Proliferation, morphodifferentiation, histodifferentiation, mineralizationD. Initiation, proliferation, morphodifferentiation, histodifferentiation, Mineralization

95. At birth, some calcified dental tissues are presentedA. All deciduous teeth and all permanent incisorsB. All deciduous teeth and permanent central incisorsC. All deciduous teeth and the first permanent molarsD. Deciduous teeth only


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96.Which one of the following statement is correctA. The remnants of Ameloblast contribute to the primary enamel cuticleB. the last secretion of the odontoblast is cementum XC. The last secretion of the ameloblast is the acquired of enamel cuticleD. The remnants of odontoblast form the primary enamel cuticle

131. Reconstructing the occlusal anatomy is based onA. Functional factorsB. Depth of restoration on a toothC. Necessity to restore normal anatomy

171. The cause of development of lateral canals isA. Cracks in Hertwigs epithelial root sheath

200. In periodontal membrane, what epithelial cells you can findA. Epithelial rests of Malaise

201. Applying hypertonic Fluid on the dentine the transmission of fluid throughtubules will beA. From inside to outsideB. From outside to inside

202. Transmission of fluid in dentinal tubules is byA. Hydrodynamic pressure (Osmotic)B. Mechanica

203. Gate theory about pain control is

A. One hypothesis of pain modulation is based upon the inhibitoryexcitatoryinteraction of afferent fibre synapses

295. Which one of the following statement is correctA. The remnants of Ameloblast contribute to the primary enamel cuticleB. the last secretion of the odontoblast is cementum XC. The last secretion of the ameloblast is the acquired of enamel cuticleD. The remnants of odontoblast form the primary enamel cuticle

393. Which of the following does state BEST the morphology of periodontal ligamentfibres

A. ElasticB. StriatedC. Non striatedD. LevityE. Wavy

409. All of the following are keratinised EXCEPT ofA. Crevicular epitheliumB. Palatal epitheliumC. Alveolar mucosaD. Free gingiva

E. Attached gingiva


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487. Which is the only dental tissue that lose its formative cells as it matures

A. Enamel

B. DentineC. Pulp

D. Cementum

488. The muscle responsible for maintaining the bolus of food while chewing isA. BuccinatorB. Orbicularis oris

489. Which muscle contracts during the tongue protrudesA. MylohyoidB. Genioglossus

C. Digastric

493. During manual palpation, the mucosa is thin inI. Midline of the palateII. Mylohyoid regionIII. Over torus palatinusA. I, II and IIIB. None of the aboveC. I and IID. II and III

515. On inspection of lateral boarder of the tongue at the base, which structurewould you expect to findA. Filiform papillaeB. Fungiform papillaeC. Taste budsD. Lymph nodes

553. What is true in regards to lateral mandibular incisorA. 20% have 2 canals with one foramenB. 20% have 2 canals with two foraminaC. 40% have two canals with 10% ending in two foramina

D. 40% have two canals with only one ending in two foramina

569. Which of the following statements is trueA. Last secretion of odontoblast forms cementumB. Last secretion of odontoblast forms acquired enamel cuticleC. Remnants of ameloblasts form primary enamel cuticleD. Remnants of odontoblasts form primary enamel cuticle

593.The papillae that are few in numbers, associated with MOST taste buds,associated with Von Ebners glands are**A. Fungiform

B. CircumvallateC. Foliate


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D. Filiform

609. The places for new erupted mandibular molars are created byA. Resorption of anterior ramus and apposition posteriorlyB. Apposition of alveolar process

C. Apposition of inferior boarder of mandible

611. What is the histopathology of the pathogenesis of the plaque following 21 daysof plaque accumulateA. Primarily infiltrate of plasma cellsB. Primarily infiltrate of lymphocytesC. Infiltrate of plasma cells and early bone involvementD. Infiltrate of neutrophils

616. A patient has improperly formed DEJ, reduction in size of pulp chamber,chipping and attrition of enamel that would MOSTLY be

A. FluorosisB. Amelogenesis imperfectaC. Dentinogenesis imperfect

653. When comparing the mesio distal length of second deciduous molar with thelength of 2nd premolar; we will find the deciduous tooth isA. LongerB. ShorterC. Near the same size

737. Dentinogeneses imperfecta develops in

A. Initial stageB. Proliferation stageC. Histodifferentiation stageD. Morphology stage

755. In regards to the enamel surfaceA. It is a perfect substance for bondingB. It does not conform to the bonding requirementsC. It is the most inorganic, rough partD. It is free from contamination and roughnessE. None of the above

759. The surface of enamel rods prisms in permanent teeth isA. Perpendicular to the outer surface of the toothB. Parallel to the outer surface of the toothC. Parallel to enamel contourD. Parallel to enamel-dentine contour

795. During teeth eruption, the reduced enamel epithelium merges with the oralepithelium and consequently.????A. Down growth of oral epithelium which replaces the reduced enamel epitheliumB. Proliferation of inner enamel epithelium

C. Proliferation of outer enamel epitheliumD. Down growth of oral epithelium which undermines the reduced enamel epithelium


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E. Gradual transformation of the reduced enamel epithelium

801. The final deposition of ameloblast occurs**A. Primary enamel cuticleB. Secondary enamel cuticle

C. Acquired enamel cuticleD. Cementum

802. Oral epithelium fused with reduced epithelium to formA. Junctional enamel epithelium

923. Two conditions of enamel facilitate post eruptive uptake of fluoride elementA. Hyper mineralisation and surface dentineB. Surface demineralisation and hypo mineralisationC. Dental fluorosis and enamel opacities

924. In regards to topically applied fluorideA. Effective in incorporated into dental plaqueB. Inhibits acid demineralisation of enamel

997. In cavity preparation 1mm below DEJ what is seenA. More dentinal tubules, some intertubular and peritubularB. Some dentinal tubules, more intertubular and less peritubularC. More peritubular, some intertubular and dentinal tubularD. Equal amount of dentinal tubules, intertubular and peritubular

1003. The MOST common curvature of palatal root of maxillary first molar is

A. DistalB. MesialC. BuccalD. Palatal

1013. The MOST likely factor contributes to tooth eruption is**A. The growing rootB. Bone growthC. Vascular pressureD. The developing periodontal ligament

1056. What is the MOST COMMON configuration of the mesialbuccal canal of upper first molar**A. Two canals and one foramina

Dental Anatomy and Histology

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