All Free Oral Anatomy MCQs with Answers

• A. Tight contacts, absence of spacing
• B. Shallow overjet and overbite
• C. Flush terminal plane
• D. Ovoid arch form

Explanation: Spacing, including primate spaces, is common in the deciduous dentition because the primary teeth are narrower than the permanent…

• A. Esthetics
• B. Centric stability
• C. Chewing efficiency
• D. Soft tissue protection

Explanation: The maxillary buccal and mandibular lingual cusps form the outer protective components of the occlusion, shielding the cheeks and tongue…

• A. Embrasure of 37 & 38
• B. Embrasure of 36 & 37
• C. Mesial pit of 37
• D. Immediately incisal to cingulam

Explanation: The maxillary second molar is positioned about half a cusp mesial to the mandibular second molar, so its distobuccal cusp falls in the…

• A. Buccal side
• B. Distal side
• C. Mesial side
• D. Lingual side

Explanation: After loss of the permanent first molar, the second molar usually drifts mesially into the vacant space because teeth tend to migrate…

• A. Fossa and rdges
• B. Occlusal pits and fissures of mandibular teeth
• C. Lingual cusps of mandibular teeth
• D. Grooves and embrasures

Explanation: Maxillary buccal cusps are non-supporting or guiding cusps and generally pass into the grooves and embrasures between mandibular posterior…

• A. Buccals slopes of buccal cusps of maxillary posterior teeth
• B. All slopes of lingual cusps of mandibular posterior teeth
• C. Lingual slopes of lingual cusps of mandibular posterior teeth
• D. Buccal slopes of lingual cusps of maxillary posterior teeth

Explanation: In centric occlusion, contact can occur on the buccal slopes of maxillary lingual cusps because these slopes face the opposing mandibular…

• A. Horizontal overlap
• B. Vertical overlap
• C. Transverse plane discrepancy
• D. All the above

Explanation: Overjet is the horizontal distance between the incisal edges of the maxillary and mandibular anterior teeth.

• A. 10 - 14 years
• B. 15 -25 years
• C. Above 30 years
• D. Edentulous patients

Explanation: Group-function occlusion commonly develops in adults over 30 as canine guidance becomes reduced by wear, migration, or periodontal…

• A. Cusp - to - cusp contact
• B. Edge- to - edge contact
• C. Marginal contact
• D. Surface - to- surface contact

Explanation: Occlusion refers broadly to the meeting or contact of opposing tooth surfaces, rather than a required cusp-to-cusp or edge-to-edge…

• A. Non- supporting cusps
• B. Centric holding cusps
• C. Supporting cusps
• D. Stamp cusps

Explanation: The facial occlusal line follows the buccal cusps of maxillary posterior teeth.

• A. Mansoon curve
• B. Wilson curve
• C. Curve of spee
• D. Caternary curve

Explanation: The curve of Wilson is the mediolateral curve formed by joining the buccal and lingual cusp tips of mandibular posterior teeth.

• A. Protrusive contacts
• B. Rest position
• C. Centric occlusion
• D. Laterotrusive contacts

Explanation: Centric occlusion, commonly corresponding to maximum intercuspation, produces the greatest interdigitation and contact between maxillary…

• A. Maxillary primary second molar
• B. Maxillary permanent second molar
• C. Maxillary primary first molar
• D. Maxillary permanent first molar

Explanation: The permanent maxillary first molar is the key to normal occlusion because its mesiobuccal cusp fits into the buccal groove of the…

• A. Distal fossa of mandibular 2ndpremolar
• B. Mesial fossa of mandibular 1st molar
• C. Distal marginal ridge of mandibular 2ndmolar
• D. Distal marginal ridge of mandibular 1st premolar

Explanation: The lingual cusp of the maxillary second premolar is a supporting cusp and seats in the distal fossa of the mandibular second premolar.

• A. incisal embrasure of canine and premolar
• B. Facial embrasure of canine and premolar
• C. Distal ridge of the cusp of mandibular canine
• D. Mesial ridge on the facial cusp of mandibular first premolar

Explanation: In normal Class I occlusion, the maxillary canine cusp lies in the facial embrasure between the mandibular canine and first premolar.

• A. Protruded
• B. Intruded
• C. Extruded
• D. Retruded

Explanation: Without an opposing tooth to provide occlusal resistance, a molar commonly moves occlusally beyond its normal plane, a process called…

• A. Mesiobuccal surface
• B. Mesial surface
• C. Distobuccal groove
• D. Transverse groove

Explanation: The mesiobuccal cusp of the maxillary first molar normally fits into the buccal groove region of the mandibular first molar, establishing…

• A. Lateral incisors
• B. Third molars
• C. Permanent central incisors
• D. Permanent canines

Explanation: The maxillary third molar usually has only one opposing tooth, the mandibular third molar.

• A. Cusps
• B. Root forms
• C. Embrasures
• D. Periodontal fibers

Explanation: Cuspal interlocking, favourable root forms and periodontal fibres all help resist tooth displacement and support arch stability.

• A. 20 to 55 pounds
• B. 30 to 75 pounds
• C. 50 to 75 pounds
• D. 90 to 200 pounds

Explanation: Masticatory force increases toward the posterior teeth, and the molar region can generate approximately 90 to 200 pounds of biting force.