A manual of dental anatomy, human and comparative / by Charles S. Tomes ; edited by H.W. Marett Tims and A. Hopewell-Smith.

  • Tomes, Charles S. (Charles Sissmore), Sir, 1846-1928.
Date:
1914
Catalogue details

Licence: In copyright

Credit: A manual of dental anatomy, human and comparative / by Charles S. Tomes ; edited by H.W. Marett Tims and A. Hopewell-Smith. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    From before backwards they are broad at the neck; hence the roots are very much flattened from side to side, and rotation is inadmissible in the attempt to extract them. The enamel contour at the neck is similar to that of the upper incisors, but there is no well-marked cingulum. The Mandibular Second Incisors, unlike the upper teeth, are distinctly larger than the first in each of their dimen- sions, but more especially in the length of their roots, which are much flattened, and often present on their sides a median longitudinal depression, sometimes amounting to an actual groove. The proximal angle of the crown is rounded off like that of the upper lateral incisors, though not so markedly. The Canines are in all respects larger teeth than the incisors; not only are their crowns thicker and stronger, but their roots are very much longer. The crown terminates in a blunt point, which lies in a straight line with the long axis of the root. A feebly-pro- nounced line or ridge runs down the outer surface of the tooth from this point to the neck. The crown slopes away both Fig. 4.—A maxillary canine, showing (A) labial, (B) lingual and (C) proximal surfaces, the basal cusp and the three ridges which con- verge towards it. before and behind the point or cusp, but as that side of the tooth which lies next to the premolar is convex, and, as it were, produced towards that tooth, the slope is longer on the proximal than on the distal half of the crown. The asymmetry of the shape of the crown makes it easy to determine at a glance to which side of the mouth the canine belongs. The internal or lingual surface is not concave like that of the incisors, but is in a slight degree convex, and a median A B C