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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1. Among the difference between teeth in the decidous and the permanent dentition is that_____________?
- A. Buccal surfaces of the permanent molars are flatter
- B. Crowns of decidous incisors are wider mesiodistally than their cervico incisal lengthsBook Dental Checkups
- C. Root trunks of decidous teeth are larger compared with their overall root lengths
- D. Cervical ridges are more pronounced in permanent molars
Explanation: Primary incisor crowns are characteristically wider mesiodistally than they are cervicoincisally, giving them a broad, squat appearance.
Correct answer: Crowns of decidous incisors are wider mesiodistally than their cervico incisal lengthsBook Dental Checkups- A. Permanent central incisors
- B. Permanent maxillary canines
- C. Decidous maxillary central incisors
- D. Permanent mandibular lateral incisorsExplore Anatomy Models
Explanation: The primary maxillary central incisor has a mesiodistal width greater than its cervicoincisal height, unlike most permanent incisors.
Correct answer: Decidous maxillary central incisors- A. Distobuccal
- B. Distolingual
- C. Mesiobuccal
- D. Mesiolingual
Explanation: In the primary mandibular first molar, the mesiolingual cusp is the highest, longest and sharpest cusp.
Correct answer: Mesiolingual- A. Maxillary second molarBook Dental Checkups
- B. Maxillary first molar
- C. Mandibular second molar
- D. Mandibular first molar
Explanation: The primary mandibular first molar is notable for a prominent transverse ridge formed by the union of triangular ridges from opposing…
Correct answer: Mandibular first molar- A. All of the above
- B. Pulp chambers are longer
- C. Roots are flaring
- D. Thickness of enamel and dentin
Explanation: Primary teeth have thinner enamel and dentin, proportionately larger pulp chambers, and widely flared roots to accommodate the developing…
Correct answer: All of the above- A. Permanent second molar
- B. Second premolar
- C. Permanent first molar
- D. Primary first molar
Explanation: The primary mandibular second molar closely resembles the permanent mandibular first molar in its occlusal outline and five-cusp pattern.
Correct answer: Permanent first molar- A. One
- B. Two
- C. Four
- D. Three
Explanation: A primary maxillary first molar normally has three roots: mesiobuccal, distobuccal, and palatal.
Correct answer: Three- A. 2
- B. 3
- C. 4
- D. 5
Explanation: The primary maxillary first molar generally has four cusps, although the distolingual cusp may be relatively small.
Correct answer: 4- A. Mandibular 1st molar
- B. Mandibular2nd molar
- C. Maxillary 2nd molar
- D. None of the above
Explanation: The primary mandibular second molar is usually the largest tooth in the primary dentition, particularly in mesiodistal width.
Correct answer: Mandibular2nd molar- A. Buliker anteroposteriorly
- B. Slender anteroposteriorly
- C. Bulkier mesiodistally
- D. Slender mesiodistally
Explanation: Primary molars show marked cervical constriction, so their cervical portions are relatively slender mesiodistally compared with the…
Correct answer: Slender mesiodistally- A. Four pulp horn and three root canal
- B. Three pulp horn and three root canal
- C. Two pulp horn and two root canal
- D. Two pulp horn and three root canal
Explanation: The pulp of a primary maxillary first molar commonly has four pulp horns but three root canals, corresponding broadly to its three roots.
Correct answer: Four pulp horn and three root canal- A. 50μm
- B. 25 μm
- C. 75μm
- D. 100μm
Explanation: The prismless outer enamel layer of primary teeth is approximately 25 micrometres thick.
Correct answer: 25 μm- A. Same as permanent teeth
- B. Inclined in an apical direction in the cervical third of crown
- C. Inclined in an occlusal direction in the cervical third of crown
- D. None of the above
Explanation: In primary teeth, enamel rods in the cervical third incline occlusally toward the gingival margin, unlike the usual apical inclination…
Correct answer: Inclined in an occlusal direction in the cervical third of crown- A. Greater
- B. Less
- C. The same
- D. Not related
Explanation: The combined mesiodistal width of the primary first and second molars is generally greater than that of their permanent premolar…
Correct answer: Greater- A. Decidous mandibular 1st molar
- B. Decidous maxillary 2nd molar
- C. Decidous maxillary 1st molar
- D. Decidous mandibular 2nd molar
Explanation: A cusp of Carabelli may occur as a normal accessory cusp on the primary maxillary second molar, as it commonly does on the permanent…
Correct answer: Decidous maxillary 2nd molar- A. 3
- B. 6
- C. 4
- D. 5
Explanation: The mandibular second primary molar usually has five cusps, and its pulp chamber commonly reflects this pattern with five pulp horns.
Correct answer: 5- A. Central incisors
- B. Canines
- C. Mandibular second molar
- D. Mandibular first molar
Explanation: The primary mandibular first molar differs most strikingly from its permanent successor in crown form, with a unique morphology that…
Correct answer: Mandibular first molar- A. Decidous maxillary 1st molar
- B. Decidous maxillary 2nd molar
- C. Decidous mandibular 2nd molar
- D. Decidous mandibular 1st molar
Explanation: Among the listed primary molars, the maxillary second molar generally has the greatest faciolingual crown width.
Correct answer: Decidous maxillary 2nd molar19. Which of the following decidous molars bears the greatest resemblance to a premolar _____________?
- A. Mandibular first
- B. Maxillary second
- C. Maxillary first
- D. Mandibular second
Explanation: The primary maxillary first molar most closely resembles a premolar in its crown form.
Correct answer: Maxillary first- A. First molar
- B. Central incisors
- C. Canines
- D. Premolars
Explanation: Canines have long, strongly anchored roots and robust crowns, making them particularly resistant to periodontal breakdown and commonly the…
Correct answer: CaninesTooth Morphology MCQs: common questions
Are these Tooth Morphology MCQs free?
Yes. All Tooth Morphology MCQs from Oral Anatomy are free on TestUstad, with unlimited attempts and no account needed. Nothing on this page is a sample or a trial.
How many Tooth Morphology MCQs are on this page?
There are 120 Tooth Morphology MCQs in the Oral Anatomy bank, shown 20 to a page with the correct answer and an explanation on each.
Does every Tooth Morphology MCQ have an explanation?
Yes. Each Tooth Morphology question shows the correct option and a written explanation of why it is correct, so a wrong answer teaches you something rather than just being marked wrong.
Can I take a timed Tooth Morphology test?
Yes. The practice button on this page starts a free Tooth Morphology test drawn from the Oral Anatomy bank. It marks each answer instantly, gives you a score at the end, and can be retaken as many times as you like.