Oral Anatomy Lab Exam 2025 With 100% Correct Answers

Oral Anatomy Lab Exam 2025 With
100% Correct Answers

What are the 5 general rules of embrasures? - CORRECT ANSWER✔✔1. Occlusal embrasures
INCREASE in size from anterior to posterior

2. Gingival embrasures DECREASE in size from anterior to posterior

3. facial and lingual embrasures are EQUAL in size on ANTERIOR teeth

4. lingual embrasures are LARGER than facial embrasures with POSTERIOR teeth

5. They are symmetrical



How many point angles do all teeth have? What are their names? - CORRECT ANSWER✔✔4

Mesio-labio-incisal/occlusal

Mesio-linguo-incisal/occlusal

Disto-labio-incisal/occlusal

Disto-linguo-incisal/occlusal



How many line angles do ANTERIOR teeth have? What are their names? - CORRECT
ANSWER✔✔6

labioincisal

linguoincisal

mesiolabial

distolabial

mesiolingual

distolingual

, How many line angles do POSTERIOR teeth have? What are their names? - CORRECT
ANSWER✔✔8

bucco-occlusal

mesio-occlusal

disto-occlusal

linguo-occlusal

mesio-buccal

mesio-loingual

disto-buccal

disto-lingual



Which posterior tooth does not have a transverse ridge? - CORRECT ANSWER✔✔Mandibular
2nd PM (3 cusp-type)



Which PM has a central fossa and a central pit? - CORRECT ANSWER✔✔Mandibular 2nd PM (3
cusp-type)



The mesial depression extends onto the crown of which tooth? - CORRECT
ANSWER✔✔Maxillary 1st PM



Where is the proximal HOC on the premolars? - CORRECT ANSWER✔✔Just cervical to junction
of occlusal and middle 1/3



What are the 6 boundaries of the occlusal table of premolars? - CORRECT ANSWER✔✔Mesial
marginal ridge

Mesial cusp ridge of buccal cusp

Distal cusp ridge of buccal cusp

Distal marginal ridge