Learning objective: to study the peculiarities of the anatomical structure of maxillary and mandibular canines, to learn to identify the distinctive features of teeth belonging to the right and left side, to the upper or lower jaw.
UPPER CANINE
From the vestibular surface it is diamond-shaped, with three ridges: longitudinal, medial, distal. The major tubercle and an additional tubercle are well pronounced, there are two depressions: medial and distal (fig. 12.1).
&hide_Cookie=yes)
From the oral surface, which is of rhomboid shape, three ridges are distinguished: longitudinal, medial, distal, with two indentations: medial and distal. The following parts are well developed: the shearing tuber, additional tubercle, anatomical neck. There is also a palatal tubercle and an additional ridge (fig. 12.2).
&hide_Cookie=yes)
The lateral surfaces are triangular in shape. The medial surface shows: the shearing tuber, medial and palatal tubercle; the distal surface shows the shearing tuber, distal tubercle, an additional distal tubercle, and the palatine tubercle (fig. 12.3).
&hide_Cookie=yes)
The cavity of the crown is pointed in the direction of the major tuber, then gradually expands to the level of the corners and reaches a maximum in the cervical region, after which it narrows and passes into the root canal.
The root is slightly compressed laterally. The lateral surface is more convex than the medial one.
The following signs are well expressed.
► Crown height 10-12 mm.
► Width 7-8 mm.
► Vestibulo-lingual diameter of the neck of the tooth 7-8.5 mm.
► Medio-distal diameter of the neck of the tooth 5-6 mm.
► Root length 16-18 mm.
LOWER CANINE
From the vestibular surface the tooth is diamond-shaped. It has a longitudinal, medial, distal ridge, a well-defined shearing tuber and two indentations: medial and distal (fig. 12.4).