ANAT1010: Characteristics of Posterior Teeth

A cone shaped elevation on the occlusal surface of posterior teeth is called...?

• a) cusp

• b) fossa

• c) marginal ridge

• d) pit

A oblique cusp ridge runs at a 90 degree angle to the central dissectional groove.

• a) True

• b) False

Concavities, or depressions in the occlusal surface that are bordered by the occlusal perimeter and the ridges are called...?

• a) fossae

• b) cusps

• c) oblique ridges

• d) transverse cusp ridge

A small cusp-like elevation of over calcified enamel that is found on some portion of a tooth crown is called...? (hint: most commonly found on maxillary first molars)

• a) cusp tip

• b) cusp of carabelli

• c) fossae

• d) none of the above

A groove that divides a posterior tooth into distinct parts is called...?

• a) oblique ridge grooves

• b) dissectional groove

• c) secondary grooves

• d) marginal ridge grooves

A ridge on the occlusal surface of a posterior tooth that extends from the cusp tip to the central developmental groove is called...?

• a) marginal ridge

• b) triangular ridge

• c) oblique ridge

• d) all of the above

Which out of the following molars have 5 cusps?

• a) maxillary first molar

• b) mandibular first molar

• c) maxillary second molar

• d) mandibular third molar

Which of the following molars have three roots?

• a) maxillary right second molar

• b) maxillary left first molar

• c) mandibular right third molar

• d) both a & b

The permanent maxillary right second molar occlusal outline of the crown is rhomboidal in shape.

• a) True

• b) False

Which premolar usually has 3 cusps?

• a) mandibular right second premolar

• b) maxillary right first premolar

• c) maxillary left second premolar

• d) mandibular right third premolar