oral anatomy MCQs – Page 10

Practise focused oral anatomy questions with marked answers for exam preparation and subject revision.

oral anatomy Mcqs
181. The term diphydont means____________?
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A. Two separate sets of dentition

B. Two same sets of dentition

C. More than two sets of dentition

D. Second dentition

182. The maxillary molar crown of an early fossil primate featured a trigone made of three main cusps, these cusps were_____________?
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A. Distolingual, Mesiobuccal, and Linguo buccal

B. Distrobuccal, distolingual and Mesiolingual

C. Mesiobuccal, Distobuccal and Mesiolingual

D. Mesiolingual, Mesiobuccal and distolingual

183. Protective crests of contour on buccal and lingual surfaces are found______________?
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A. In the middle third of the lingual

B. Nearest the occlusal third of the lingual

C. In the cervical third of the buccal

D. Both A and C
184. The most constant and valuable trait to differentiate among maxillary first, second and third molars i____________?
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A. Comparative size of the cusp of carabelli

B. Relative position of the distolingual grooves

C. Depth of central fossae

D. Number of roots

185. Fourth canal is present in_____________?
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A. Mesiobuccal roots of maxillary first molar

B. Distal root of mandibular first molar

C. Both of the above

D. None of the above

186. The shape of the occlusal surface of the permanent maxillary first molar is_______________________?
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A. Oval

B. Trapezoidal

C. Rhomboidal

D. Triangular

187. The two major fossa of permanent maxillary first molar________________?
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A. Distal fossa and distal tringaular fossa

B. Mesial and distal tringular fossa

C. Central fossa and mesial fossa

D. Central and distal fossa
188. The mesial contact are of the permanent canine is at the_______________?
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A. Junction of the middle & cervical thirds

B. Middle third

C. None of the above

D. Junction of incisal and medial thirds

189. Which teeth the proximal aspect shows rhomboidal appearance________________?
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A. Maxillary posteriors

B. Mandibular posteriors

C. Maxillary anteriors

D. Mandibular anteriors

190. According to Schour & Massler the crown completion of both permanent maxillary and mandibular first molars is________________?
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A. 2 3 years

B. 3-4 years

C. 3-5 years

D. 1 2 years

191. Upper 4 resembles 5 from which aspect ?
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A. Lingually

B. Occlusal

C. Buccally

D. Proximally

192. The occlusal surface shape of a 3 cusped mandibular second premolar_________________?
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A. Square

B. Oval

C. Tetrahedral

D. Elliptical

193. Most common morpholgical variation is seen in________________?
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A. Mandibular lateral incisor

B. Maxillary canine

C. Maxillary lateral incisor

D. Mandibular canine

194. Position and movement of articular disc of TMJ is controlled by fibers of_____________?
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A. Sphenomandibular ligament

B. Lower head of lateral pterygoid muscle

C. Upper head of lateral pterygoid muscle

D. Superficial head of medial pterygoid muscle

195. The curvature of the cervical line of most teeth will be approximately____________?
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A. 1 mm less distally than mesially

B. 2 mm less distally than mesially

C. 1 mm less lingually than buccally

D. 2 mm less lingually than buccally

196. Generally , contact areas between posterior teeth are located in which directions from the centr of the proximal surface ____________?
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A. Lingually and gingivally

B. Lingually and occlusally

C. Facially and occlusally

D. Facially and gingivally

197. In which of the tooth is the mesiodistal measurements is greater lingually than facially________________?
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A. Mandibular 2ndpremolar

B. Maxillary 1st molar

C. Mandibular 1st premolar

D. Maxillary 1stpremolar

198. Dentin islands are frequently found in the root canals of which of the following permanent teeth ?
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A. Maxillary 2nd premolar & maxillary 1st molar

B. Maxillary 2nd premolar & mandibular canine

C. Maxillary lateral incisor & mandibular canine

D. Maxillary 1st molar & mandibular 2nd premolar

199. The shortest root on a maxillary first molar is_____________?
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A. Lingual

B. All are of equal length

C. Disto buccal

D. Mesio- buccal

200. Which is the predominant factor in the formation of the alveolar process_____________?
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A. Eruption of teeth

B. Overall growth of the bodies of the maxilla and the mandible

C. Normal process of growth

D. Lengthening of the condyle