. Cunningham's Text-book of anatomy. Anatomy. PEEMAXEXT TEETH. 1117 Foramen incisivuui —~~^ Dentes incisivi Dentes Canini.—In the four canine teeth, which succeed the incisors in each row (Figs. 881 and 886), the crown is large and conical, corresponding closely in general form to a very large central incisor with its angles cut away, so that the crown assumes a pointed or conical shape. The labial surface is convex, the lingual usually somewhat concave. The root is single and long, particularly in the upper canine, the root of which is longer than that of any other tooth, and produces the can
. Cunningham's Text-book of anatomy. Anatomy. PEEMAXEXT TEETH. 1117 Foramen incisivuui —~~^ Dentes incisivi Dentes Canini.—In the four canine teeth, which succeed the incisors in each row (Figs. 881 and 886), the crown is large and conical, corresponding closely in general form to a very large central incisor with its angles cut away, so that the crown assumes a pointed or conical shape. The labial surface is convex, the lingual usually somewhat concave. The root is single and long, particularly in the upper canine, the root of which is longer than that of any other tooth, and produces the canine eminence on the anterior surface of the maxilla. The upper canines are larger than the corresponding lower teeth, behind which they bite; and they are sometimes known as the " eye ; The upper canine presents on its lingual surface a well-marked cingulum, and often a distinct lingual tubercle; in addition, there is usually a median ridge running from the point of the crown to the apex of the cingulum, which is separated from the lateral part of the cingulum on each side by a slight depression. These points are neither so well marked, nor so constant, in the lower as in the upper canine. Of the two margins sloping away from the apex of the crown, the lateral is the longer in both teeth. After it has been a little worn the lower canine is less distinctly pointed than the upper ; its root is also more flattened. On the labial surface of the crown, of both canines and premolars, a wide low vertical ridge (labial ridge) can generally be made out (Fig. 882); it is most distinct on the canine and first upper pre- molar. Dentes Prsemolares (Figs. 881 and 882). — The premolar teeth, eight in number, two in each jaw above and below, are placed posterior to the canines, and anterior to the molars, as the name indicates. The crown, which, unlike that of the incisors and canines, is flat- tened antero - posteriorly, is characterised by the presence of two tubercles
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
