Sales Training 2014 - Dentistry

Permanent Maxillary and Mandibular Canines

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2. Outlines of the crown: The outlines of the crown are similar to the mesial aspect except that they are more convex than in the mesial surface. 3. Contact area: The distal contact area is at the centre of the middle third. 4. Outlines of the root: The outlines of the root are similar to those of the mesial aspect. The surface of the root from the distal aspect shows a vertical, shallow depression extending from the cervical line to the apex. INCISAL ASPECT 1. Shape of the crown: The shape of the crown is roughly ovoid in the incisal aspect. 2. Outlines of the crown (Fig. 14.9): The increased labiolingual dimensions of the canine can be seen from this aspect. The crown outline from this aspect is asymmetrical, with mesial portion of the crown having lesser mesiodistal dimen- sions. (a) Labial outline: The labial outline is convex and makes the crown appear bulkier. (b) Lingual outline: The mesial and distal mar-

Contact area

SECTION II

Figure 14.8 Distal aspect of canine.

(a) Labial outline: The labial outline of the root is slightly convex from the cervical third to the middle third and tapers to the apex. (b) Lingual outline: The lingual outline is straight from the cervical third to the mid- dle third and there is a gradual taper to the apical third. DISTAL ASPECT (FIG. 14.8) The distal aspect of the crown is bulkier than in the incisors; the distal surface is slightly convex in the incisal third and becomes slightly concave above the contact area. 1. Shape of the crown: The distal aspect of the crown is triangular or wedge shaped.

ginal ridges converge towards the cingu- lum. The lingual outline is smaller in di- mensions than the labial aspect. Two fossae, the mesiolingual fossa and the distolingual fossa, are seen from this aspect.

Ovoid incisal outline

Mesiolingual fossa Distal cusp ridge

Mesial cusp ridge Distolingual fossa Distal marginal ridge Lingual ridge

Mesial marginal ridge

Cingulum

Figure 14.9 Incisal outline of the maxillary canine.

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6/1/2012 11:39:07 AM