Free Tooth Morphology MCQs with Answers
120 Tooth Morphology MCQs from Oral Anatomy, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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- A. Herbivorous
- B. None of the aboveBook Dental Checkups
- C. Carnivorous
- D. Omnivorous
Explanation: Humans are omnivores because the dentition contains incisors and canines for cutting and tearing, together with premolars and molars…
Correct answer: Omnivorous- A. Upper central incisors
- B. Lower central incisors
- C. Upper canines
- D. Lower canines
Explanation: The labial plate over the mandibular central incisors is particularly thin because the roots lie close to the labial cortical plate.
Correct answer: Lower central incisors- A. Mesiolingual and mesiofacial
- B. Mesiofacial and distolingual
- C. Distofacial and mesiolingual
- D. Distofacial and mesiofacial
Explanation: The occlusal outline of the maxillary first molar is rhomboidal, with acute mesiobuccal and distolingual angles and obtuse mesiolingual…
Correct answer: Distofacial and mesiolingual- A. Canine
- B. 3rd molar
- C. Lateral incisors
- D. 1st premolar
Explanation: The mandibular first premolar has a strongly lingually inclined crown, reflected by its small, nonfunctional lingual cusp and steep…
Correct answer: 1st premolar- A. Root length
- B. Mesiodistal crown width
- C. Faciolingual crown width
- D. Crown length
Explanation: The maxillary lateral incisor has a smaller crown than the central incisor in both length and mesiodistal and faciolingual dimensions, but…
Correct answer: Root length- A. Maxillary posteriors
- B. Maxillary anteriors
- C. Mandibular posteriors
- D. Mandibular anteriors
Explanation: Mandibular posterior teeth show a rhomboidal outline from the proximal view because their crowns are inclined lingually over the roots.
Correct answer: Mandibular posteriors- A. Mandibular 1st molar
- B. Maxillary 1st molar
- C. Mandibular 2nd molar
- D. Maxillary 1st premolar
Explanation: The maxillary first premolar has relatively steep, sharply defined cusps, especially compared with the flatter cusps of mandibular molars.
Correct answer: Maxillary 1st premolar- A. 1 lingual and 2 facial
- B. 1 facial and 2 lingual
- C. 1 mesial and 2 buccal
- D. 1 mesial and 1 distal
Explanation: A maxillary first molar normally has three roots: two buccal roots, mesiobuccal and distobuccal, and one lingual or palatal root.
Correct answer: 1 lingual and 2 facial- A. 26 mm
- B. 33 mm
- C. 21 mm
- D. 18 mm
Explanation: The maxillary canine is the longest permanent tooth, with an average total length of about 26 mm.
Correct answer: 26 mm- A. Mandibular lateral incisor
- B. Mandibular canine
- C. Mandibular central incisor
- D. Maxillary central incisor
Explanation: The mandibular central incisor is the most bilaterally symmetrical permanent tooth, especially from the labial and incisal views.
Correct answer: Mandibular central incisor- A. Third molar
- B. First premolar
- C. Central incisor
- D. Second molar
Explanation: The maxillary third molar has the greatest variation in root number, form, curvature, and alignment.
Correct answer: Third molar- A. Maxillary roots are inclined distally where as Mandibular roots are inclined mesially
- B. All of the above
- 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
Explanation: The general arrangement is distal inclination of maxillary roots and mesial inclination of mandibular roots, with maxillary posterior…
Correct answer: All of the above- A. 3
- B. 4
- C. 5
- D. 6
Explanation: The permanent mandibular first molar develops from five lobes: three buccal lobes and two lingual lobes.
Correct answer: 5- A. Central fossa and mesial fossa
- B. Distal fossa and distal tringaular fossa
- C. Mesial and distal tringular fossa
- D. Central and distal fossa
Explanation: The two major fossae of the maxillary first molar are the central fossa and the distal fossa.
Correct answer: Central and distal fossa- A. Maxillary 2ndmolar
- B. Maxillary 1st molar
- C. Mandibular 1st molar
- D. Mandibular 2nd molar
Explanation: The maxillary first molar may have a fifth, nonfunctional cusp called the cusp of Carabelli on the palatal side of the mesiopalatal cusp.
Correct answer: Maxillary 1st molar36. The premolar with the occlusal groove pattern that may simulate the letter "Y" is________________?
- A. Maxillary first
- B. Mandibular second
- C. Maxillary second
- D. Mandibular first
Explanation: The three-cusp type of mandibular second premolar commonly has a Y-shaped occlusal groove pattern, formed by grooves radiating between the…
Correct answer: Mandibular second- A. Line connecting mesial with distal is longest
- B. Line connecting distal with lingual is longest
- C. Line connecting mesial with lingual is longest
- D. Angle at the mesio facial canal is obtuse
Explanation: The three main canal orifices of a maxillary molar form a triangle, with the mesial-lingual distance generally being the longest side.
Correct answer: Line connecting mesial with lingual is longest- A. DB
- B. ML
- C. MB
- D. DL
Explanation: The distolingual cusp of a maxillary second molar is often reduced and may even be absent, producing a three-cusp form.
Correct answer: DL- A. ML
- B. All of the above
- C. DB
- D. MB
Explanation: A tritubercular maxillary molar has three cusps: mesiobuccal, distobuccal, and mesiolingual.
Correct answer: All of the above- A. Oval
- B. Elliptical
- C. Square
- D. Tetrahedral
Explanation: The three-cusp mandibular second premolar has a broad, nearly square occlusal outline because its two lingual cusps give the lingual half…
Correct answer: Square