Tooth Morphology Ch 12

Dental Assisting

Bicanineate

A two-cusp type of mandibular second premolar.

Bifurcated

Divided into two.

Bifurcation

Area in which two roots divide.

Canine eminence

External vertical bony ridge on the labial surface of the canines.

Central groove

Most prominent develpmental groove on the posterior teeth.

Cingulum

Raised, rounded area on the cervical third of the lingual surface.

Cusp

Major elevation on the masticatory surfaces of canines and posterior teeth.

Cusp of Carabelli

The fifth supplemental cusp found lingual to the mesiolingual cusp.

Diastema

A space between two teeth.

Fossa

Wide, shallow depression on the lingual surfaces of anterior teeth.

Furcation

Area between two or more root branches.

Imbrication

Slight ridges that run mesiodistally in the cervical third of the teeth.

Incisal edge

Ridge on permanent incisors that appears flattened on labial, lingual, or incisal view after tooth eruption.

Inclined cuspal planes

Sloping areas between the cusp ridges.

Mamelon

Rounded enamel extension on the incisal ridges of incisors.

Marginal groove

A developmental groove that crosses a marginal ridge and serves as a spillway, allowing food to escape during mastication.

Marginal ridge

Rounded, raised border on the mesial and sital portions of the lingual surfaces of anterior teeth and the occlusal table of posterior teeth.

Molars

Teeth located in the posterior aspect of the upper lower jaws.

Morphology

Study of form and shape, as of the teeth.

Nonsuccedaneous

Pertaining to a permanent tooth that does not replace a primary tooth.

Pegged laterals

Incisors with pointed or tapered shape.

Succedaneous

Permanent teeth that replace primary teeth.

Triangular groove

A developmental groove that separates a marginal ____ from the triangular ridge of a cusp.

Tricanineate

A three-cusp type of mandibular second premolar.

Trifurcated

Divided into three.

Trifurcation

Area in which three roots divide.