Overview

incisor relationship


Quick Reference

The relation of the upper and lower incisors when in tooth contact (centric occlusion). The British Standards Institute classify the incisor relationship as Class I, Class II division I or division II, and Class III.

Incisal relationship Class II Div.

Incisal relationship Class II Div II

Incisor relationship

Incisor relationship

Class

Definition

Class I

The lower incisal edges occlude with or lie immediately below the cingulum of the upper incisors.

Class II division I

The lower incisal edge occludes behind the cingulum of the upper central incisors and the upper incisors are proclined.

Class II division II

The lower incisal edge occludes behind the cingulum of the upper central incisors, and the upper incisors are retroclined (the lateral incisors may be proclined).

Class III

The lower incisal edge occludes in front of the cingulum of the upper incisors.

Subjects: dentistry.


Reference entries