Figure 4-29. Mandibular right lateral incisor.
a. Facial Surface. From the facial view, the facial surface of the incisal edge
slopes distally while the central incisor is straight. The mesioincisal angle is more acute.
The distoincisal angle is more obtuse and rounded than those of the central incisor.
b. Lingual Surface. The lingual surface has marginal ridges and cingulum
slightly more pronounced than those of the central incisor.
c. Mesial and Distal Surfaces. The mesial and distal surfaces closely
resemble those of the central incisor. The contact area on the distal surface is at the
junction of the incisal and middle thirds rather than in the incisal third as in the central
d. Incisal Edge. The incisal edge has more distal curvature than does that of
the central incisor.
e. Root. The root is longer than that of the central incisor.