oral anatomy MCQs – Page 4

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

oral anatomy Mcqs
151. The distance from the CEJ to the alveolar crest normally is____________?
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A. 1 1.5 mm

B. 3 mm

C. 2 2.3 mm

D. 2 mm

152. Single central pit is formed on occlusal surface of_______________?
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A. Maxillary first premolar

B. Maxillary second premolar

C. Mandibular second premolar

D. Mandibular first premolar

153. Which of the following is a smallest posterior tooth______________?
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A. Maxillary first premolar

B. Mandibular second premolar

C. Maxillary second premolar

D. Mandibular first premolar
154. Posterior embrasures are generally larger on the lingual than on the facial, with the contact area within the facial moiety, except between maxillary_______________?
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A. 1st and 2ndmolar

B. 1st premolar and cane

C. First molar and 2nd premolar

D. Premolars

155. A maxillary right canine may be distinguished from a maxillary left canine because ____________?
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A. Facially the cusp tip is placed distal to Bisecting line

B. The root curves to mesial in the apical 1/3rd

C. The distal half of canine shows more convexity than the mesical half

D. Lingually the cervical line slopes mesially

156. The shape of the occlusal surface of the permanent maxillary first molar is___________?
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A. Triangular

B. Rhomboidal

C. Trapezoidal

D. Oval

157. Articular disc of TMJ is__________?
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A. All of the above

B. Narrow in the centre

C. Strengthened by lateral pterygoid

D. Thickest posteriorly

158. The faciolingual angulation of the upper central incisor is approximately___________________?
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A. 33

B. 20

C. 28

D. 38

159. The interdental papilla is located in the______________?
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A. Lingual embrasure

B. Occlusal embrasure

C. Cervical embrasure

D. Facial embrasure

160. Thinnest labial plate is found in the region of____________?
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A. Upper canines

B. Lower central incisors

C. Lower canines

D. Upper central incisors

161. The permanent mandibular second molar differs from the permanent mandibular first molar in number of ______________?
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A. Roots

B. Marginal ridges

C. Cusps

D. Lingual grooves

162. Average of length of maxillary cuspid is______________?
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A. 33 mm

B. 21 mm

C. 18 mm

D. 26 mm
163. Mesial slope of buccal cusp is longer than distal slope in_________________?
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A. Mandibular canine

B. Maxillary canine

C. Maxillary 1st premolar

D. Maxillary 2nd premolar

164. Which of the premolars is usually the smallest____________?
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A. Maxillary second

B. Maxillary first

C. Mandibular first

D. Mandibular second

165. Oblique ridge in maxillary first molar joins which of the following cusps____________________?
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A. DL and DB

B. ML and DB

C. ML and MB

D. DL and MB

166. The root of maxillary lateral incisors if curved is usually in which direction ?
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A. Facial

B. Distal

C. Palatal

D. Mesial

167. Palatogingival groove is found in______________?
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A. Maxillary first molar

B. Maxillary lateral incisor

C. All of the above

D. Maxillary first premolar

168. Ratio of mesiodistal width to height of crown of maxillary canine is______________?
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A. 6:08

B. 6:10

C. 7:10

D. 8:10
169. Following eruption , the root of the maxillary central incisor completes development at what approximate age ?
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A. 7 years

B. 9 years

C. 8 years

D. 10 years
170. The number of line angles a permanent maxillary central incisor is_____________?
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A. Two

B. Six

C. Four

D. Eight

171. The root trunk of permanent mandibular first molar buccally is______________?
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A. equal in length to the crown

B. Equal is length to the mesial bifurcation of the maxillary first molar

C. None of the above

D. Equal is length to the buccal bifurcation of the maxillary first molar

172. Which of the following is true of permanent first molars occlusal surface_____________?
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A. Mandibular molar has 1 major fossa, 2 minor fossa, 5 triangular ridges and 4 grooves

B. All of the above

C. Rhomboidal shape in maxillary molars and hexagonal shape in Mandibular molars

D. Maxillary molar has 2 major fossa, 2 minor fossa, 4 triangular ridges,1 oblique ridge and 5 grooves

173. Which of the following is not a structural element of the temporomandibular joint ?
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A. Joint cavities

B. Capsular ligament

C. Articular disc

D. Sigmoid notch
174. The primary centre of formation of each lobe is present in_____________?
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A. Centre of the tooth

B. Apex of the root

C. Tip of the cusp

D. Centre of the crown

175. What is the functional form of anterior teeth from the mesial or the distal aspect ?
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A. Rhomboidal

B. Trapezoidal

C. Wedge- shaped

D. Elliptical

176. The eruption age of maxillary permanent lateral incisor is________________?
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A. 8-9 years

B. 8-9 months

C. 6-7 years

D. 10-11 years

177. Difference between mandibular and maxillary premolars is that in the mandibular premolars ?
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A. The buccal surface is rounded and less developed

B. The buccal and lingual cusps are more prominent

C. The lingual cusp is sharper and longer

D. The lingual surface rounded and less developed
178. In the triangle formed by the projection of the orifices of the canals of a maxillary molar, the_________________?
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A. Line connecting mesial with lingual is longest

B. Angle at the mesio facial canal is obtuse

C. Line connecting mesial with distal is longest

D. Line connecting distal with lingual is longest

179. No. of cusps in mandibular 1st molar_____________?
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A. 4

B. 5

C. 6

D. 3

180. Permanent mandibular first molar is developed from ______ lobes?
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A. 6

B. 5

C. 3

D. 4

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