Free Tooth Morphology MCQs with Answers

• A. The lingual root of a maxillary first molar
• B. The lingual root of a maxillary second molar
• C. The root of a maxillary canine
• D. The root of a mandibular canine

Explanation: The maxillary canine has the longest and one of the largest single roots in the dentition.

• A. Oval
• B. Trapezoidal
• C. Triangular
• D. Rhomboidal

Explanation: Viewed from the occlusal aspect, the maxillary first molar has a rhomboidal outline produced by the oblique ridge and the distolingual…

• A. Maxillary 2nd premolar & mandibular canine
• B. Maxillary 2nd premolar & maxillary 1st molar
• C. Maxillary lateral incisor & mandibular canine
• D. Maxillary 1st molar & mandibular 2nd premolar

Explanation: Dentin islands are characteristically encountered in the canals of the maxillary second premolar and mandibular canine because their roots…

• A. 6:10
• B. 6:8
• C. 8:10
• D. 7:10

Explanation: The maxillary canine crown is about 8 mm wide mesiodistally and 10 mm high cervicoincisally, giving an approximate ratio of 8:10.

• A. Mandibular 2nd premolar
• B. Maxillary 2nd premolar
• C. Mandibular 1st molar
• D. Maxillary 1st premolar

Explanation: The maxillary first premolar has the most prominent mesial buccal ridge among the listed teeth, contributing to its strongly developed…

• A. 6
• B. 8
• C. 4
• D. 10

Explanation: The permanent mandibular first molar is conventionally described as having four point angles, associated with the main buccal and lingual…

• A. Mandibular canine
• B. Mandibular first premolar
• C. Maxillary second premolar
• D. None of the above

Explanation: The lingual cusp of the mandibular first premolar is small and nonfunctional, while its large buccal cusp is functional.

• A. Number of roots
• B. Depth of central fossae
• C. Relative position of the distolingual grooves
• D. Comparative size of the cusp of carabelli

Explanation: The relative position of the distolingual groove is a dependable feature for distinguishing the maxillary first, second, and third molars.

• A. Mandibular central incisor
• B. Maxillary second premolar
• C. Mandibular lateral incisor
• D. Maxillary central incisor

Explanation: A maxillary central incisor commonly has a triangular canal cross-section, with its broad base toward the facial aspect and apex toward…

• A. Cusps
• B. Roots
• C. Lingual grooves
• D. Marginal ridges

Explanation: The mandibular first molar usually has five cusps, whereas the mandibular second molar has four cusps arranged in a more symmetrical…

• A. Mesiobuccal roots of maxillary first molar
• B. Both of the above
• C. Distal root of mandibular first molar
• D. None of the above

Explanation: A fourth canal may be the second mesiobuccal canal in a maxillary first molar or an additional canal in the distal root of a mandibular…

• A. Square
• B. Rhomboidal
• C. Quadrilateral
• D. Trapezoidal

Explanation: From the buccal aspect, posterior tooth crowns generally have a trapezoidal outline, with the cervical portion narrower than the occlusal…

• A. Cingulam of canine
• B. Distolingual cusp of molars
• C. Lingual cusp of second premolar
• D. Cusp of carabelli

Explanation: The lingual cusp of the mandibular first premolar is small and nonfunctional, resembling a reduced cingulum rather than a fully developed…

• A. Distrobuccal, distolingual and Mesiolingual
• B. Mesiobuccal, Distobuccal and Mesiolingual
• C. Distolingual, Mesiobuccal, and Linguo buccal
• D. Mesiolingual, Mesiobuccal and distolingual

Explanation: The primitive maxillary molar trigone consisted of the protocone, paracone, and metacone, corresponding to the mesiolingual, mesiobuccal…

• A. Mesiolingual
• B. Distofacial
• C. Mesiofacial
• D. Distolingual

Explanation: The maxillary second molar has a rhomboidal occlusal outline, and its mesiofacial angle is the sharpest of the four corner angles.

• A. Rhomboidal
• B. Trapezoidal
• C. Elliptical
• D. Wedge- shaped

Explanation: Viewed from the mesial or distal aspect, anterior teeth taper from the cervical region toward the incisal edge and therefore have a…

• A. 1 lobe
• B. 3 lobes
• C. 4 lobes
• D. 5 lobes

Explanation: A permanent mandibular central incisor develops from four lobes: three facial lobes and one lingual lobe that forms the cingulum.

• A. Dumbell
• B. Elliptical
• C. Kidney shape
• D. Oval

Explanation: The cervical cross-section of a maxillary first premolar is characteristically kidney-shaped because of the developmental depression on…

• A. Mandibular second premolar
• B. Mandibular third molar
• C. Maxillary second premolar
• D. Maxillary third molar

Explanation: The maxillary third molar has the greatest variation in crown form and occlusal anatomy, ranging from a reduced three-cusp form to a more…

• A. Maxillary 1st premolar
• B. Maxillary canine
• C. Mandibular 1st premolar
• D. Maxillary 2nd premolar

Explanation: The maxillary first premolar commonly has a pronounced mesial developmental concavity, often extending onto its bifurcated root surface…