oral anatomy Mcqs
201. Rounded protuberances on the incisal edges of newly erupted permanent incisors are____________?
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A. Tubercles

B. Mamelons

C. Cingulum

D. Enamel pits

202. Which of the following has a nonfunctional cusp ?
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A. Mandibular canine

B. Maxillary second premolar

C. Mandibular first premolar

D. None of the above

203. Which line angle area is most acute when a permanent maxillary second molar is viewed occlusally ?
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A. Distofacial

B. Distolingual

C. Mesiolingual

D. Mesiofacial
204. The geometric outline of the buccal surface of posterior teeth are_______________?
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A. Square

B. Quadrilateral

C. Trapezoidal

D. Rhomboidal

205. In comparison to maxillary central incisor , Maxillary canine has a height of contour that is______________?
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A. Same

B. Less

C. More

D. Different on different teeth

206. On opening the mouth , if the jaw deviates to the right side, it indicates the paralysis of__________?
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A. Left medial pterygoid

B. Right lateral pterygoid

C. Right medial pterygoid

D. Left lateral pterygoid

207. The number of point angles in a permanent mandibular first molar is_____________?
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A. 8

B. 10

C. 6

D. 4
208. Mesial concavity making the prognosis poor for a furcation involvement is present in_____________?
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A. Maxillary 2nd premolar

B. Maxillary 1st premolar

C. Mandibular 1st premolar

D. Maxillary canine

209. Mesial contact area of the permanent canine is at the______________?
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A. None of the above

B. Junction of the middle and cedrvical thirds

C. Junction of the incisal and middle thirds

D. Middle third

210. In maxillary 1st permanent molar, the 2 obtuse angles are________________?
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A. Mesiolingual and mesiofacial

B. Distofacial and mesiofacial

C. Mesiofacial and distolingual

D. Distofacial and mesiolingual
211. The permanent anterior tooth, which is most 20. Commonly atypical , is_____________?
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A. Maxillary central incisor

B. Mandibular 1st premolar

C. Mandibular central incisor

D. Maxillary lateral incisor
212. All embrasure spaces are reflection of the______________?
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A. Form of the teeth involved

B. None of the above

C. Size of the teeth involved

D. Eruption sequence involved

213. The maxillary tooth exhibiting the greatest variation in root alignment is______________?
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A. Third molar

B. First premolar

C. Second molar

D. Central incisor

214. A distinguishing characteristic of a maxillary first premolar that identifies it as right or left is the________________?
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A. Flattened area beneath the contact on the distal surface

B. Mesial inclination of the lingual cusp

C. Height of the lingual cusp

D. Greater length of the mesial cusp ridge on the lingual cusp ( AIPG- 98)

215. Buccal surface of posterior teeth are wider than lingual surface mesiodistally except in______________?
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A. Mandibular first molar

B. Maxillary first molar

C. Mandibular second premolar

D. Maxillary second premolar

216. The total number of cingula in each dentition is_______________?
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A. 6

B. 12

C. 24

D. 32

217. Which of the following premolars has a mesial marginal ridge more cervical than the distal marginal ridge________________?
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A. Mandibular 1st premolar

B. Mandibular 2nd premolar

C. Maxillary 1st premolar

D. Maxillary 2ndpremolar

218. Largest embrasure lies between______________?
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A. Maxillary lateral incisor and canine

B. Maxillary central incisors

C. Maxillary canine and first premolar

D. Maxillary central and lateral incisor

219. Acute angled cusps in permanent maxillary first molar are_____________?
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A. MB and DB

B. ML and DL

C. DB and ML

D. MB and DL
220. All are true about calciotraumatic line, except______________?
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A. Due to caries

B. It remains after caries is removed

C. Due to death of odontoblastic layer

D. Because of odontoblastic migration from cell rich zone

221. Largest cusp in permanent mandibular first molar is__________________?
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A. Mesiobuccal

B. Mesio lingual

C. Distal

D. Distobuccal

222. Which anterior teeth have both mesial and distal contact areas of at the incisal third____________?
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A. Mandibular centrals

B. Mandibular laterals

C. Both A and B

D. None of the above

223. Which bifurcation is closet to the cervical line (or) which surface has short root trunk length in a maxillary permanent first molar ?
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A. None of the above

B. Buccal

C. Mesial

D. Distal

224. Distal contact of upper first premolar is________________?
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A. Lower than mesial contact area

B. Higher than mesial contact area

C. Little cervical to junction of occlusal and middle third of crown

D. A and B
225. Using occlusal morphology as guide , the Mandibular third molar is most similar to______________?
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A. Mandibular permanent second molar

B. Mandibular permanent first molar

C. Mandibular decidous second molar

D. Maxillary permanent first molar

226. An 8 yr old child comes to your clinic with large front teeth having jagged margins, what is the treatment plan for this patient ?
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A. Smoothen the jagged margins and apply fluoride varnish

B. Extraction of big teeth

C. Assure him and send him back

D. Build up other teeth to large size

227. The largest permanent tooth in the mouth usually is_____________?
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A. Mandibular canine

B. Mandibular first molar

C. Maxillary first molar

D. Maxillary canine

228. Largest tooth in the mandibular arch is_________________?
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A. Third molar

B. Permanent first molar

C. Canine

D. Decidous first molar

229. Tritubercular cusps are_______________?
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A. ML

B. MB

C. DB

D. All of the above
230. Which of the following tooth shows largest Mesio- buccal ridge _____________?
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A. Mandibular 2nd premolar

B. Maxillary 1st premolar

C. Mandibular 1st molar

D. Maxillary 2nd premolar

231. The contact area on the distal side of a maxillary first premolar is located _____________?
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A. Middle of the middle third with lingual embrasure wider than buccal

B. Middle of the middle third with buccal embrasure wider than lingual

C. Cervical third with buccal embrasure wider than lingual embrasure

D. Litter cervical to the junction of occlusal and middle third of the crown with wide occlusal embrasure
232. Basically TMJ is a_____________?
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A. Ball and socket joint

B. Hinge and axis joint

C. Synovial joint

D. Diartmodal joint
233. Corner stones of dental arches are:
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A. First premolars

B. Canines

C. Second molars

D. First molars
234. The maxillary lateral incisor is smaller than the maxillary central incisor on all aspects EXCEPT which one of the following______________?
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A. Crown length

B. Faciolingual crown width

C. Mesiodistal crown width

D. Root length
235. Maxillary first molar has how many roots ?
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A. 1 mesial and 1 distal

B. 1 lingual and 2 facial

C. 1 mesial and 2 buccal

D. 1 facial and 2 lingual

236. The most common curvature of the palatal root of maxillary first molar is_____________?
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A. Lingual

B. Facial

C. Mesial

D. Distal

237. Which of the following has a bifid root ?
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A. 31,41

B. 34,44

C. 32,42

D. 13,23

238. Which cusp is poorly developed in a permanent maxillary second molar_____________?
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A. DL

B. MB

C. DB

D. ML

239. Mandibular second premolar 3- cusp type id developed from_______________?
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A. 6

B. 3

C. 5

D. 4

240. The contact area on the distal surface of a maxillary first premolar should be placed in________________?
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A. Middle 3rd with facial embrasure greater than the lingual embrasure

B. Occlusal 3rd of proximal surface with facial embrasure greater than lingual embrasure

C. Occlusal 3rd of proximal surface with the lingual embrasure greater than facial embrasure

D. Middle 3rd of proximal surface with lingual embrasure greater than the facial embrasure
241. An imaginary occlusal curve that contacts the buccal and lingual cusp tips of mandibular buccal teeth is called the _____________?
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A. Monson curve

B. Wilson curve

C. Catenary curve

D. Curve of spee

242. Which of the following is true for permanent teeth________________?
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A. All of the above

B. Maxillary roots are inclined distally where as Mandibular roots are inclined mesially

C. Buccal cusps of lower and lingual cusps of upper are the functional cusp

D. Maxillary molars are buccally inclined and Mandibular molars are inclined lingually

243. Depression of mandible is achieved by_______________?
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A. All of the above

B. Digastric

C. Lateral pterygoid

D. Geniohyoid

244. If the pulp of a single rooted tooth canal were triangular in cross section with the base of the triangle located facially and the apex lingually with a longer mesial side than distal side; the tooth most likely is_____________?
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A. Mandibular lateral incisor

B. Mandibular central incisor

C. Maxillary central incisor

D. Maxillary second premolar

245. If a mandibular canine has bifurcated roots, they are most commonly placed_______________?
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A. Facial and lingual

B. Mesial and distal

C. Mesiobuccal and distobuccal

D. Mesiolingual and distolingual

246. Which of the following do not contribute to arch stability ?
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A. Cusps

B. Root forms

C. Periodontal fibers

D. Embrasures
247. In which of the tooth is the mesiodistal measurements is greater lingually than facially_____________?
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A. Maxillary 1stpremolar

B. Mandibular 2ndpremolar

C. Mandibular 1st premolar

D. Maxillary 1st molar
248. The embrasure areas in the following areas are contentious______________?
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A. Labial and lingual

B. Lingual and Occlusal

C. Incisal and Occlusal

D. Labial and Occlusal