A manual of dental anatomy : human and comparative / by Charles S. Tomes.

Date:
1876
Catalogue details

Licence: Public Domain Mark

Credit: A manual of dental anatomy : human and comparative / by Charles S. Tomes. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

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    also cylindrical in the root, tapering gradually till it ap- proaches close to the apex, when it becomes suddenly con- stricted. Upper Lateral Incisors are in every dimension somewhat smaller than the centrals. They widen somewhat abruptly near to the cutting edge, but below this they taper pretty regularly to the end of the root ; the labial surface is con- vex in each direction, while the lingual surface is perhaps rather flatter than that of a central incisor. The outer (distal) angle of the crown is far more rounded or sloped away than in the centrals, and the distal surface, looking towards the canine, is in a slight degree convex ; the median surface is slightly concave. The enamel terminates towards the gum in contours pre- cisely similar to those which obtain in the centrals : but the basal ridge, or cingulum, is often more strongly pro- nounced, and the presence of a median tubercle upon it is less infrequent. From this greater prominence of the cin- gulum, caries is more frequent upon the lingual surfaces of upper lateral than upon those of upper central incisors. Fig. 2. O The pulp cavity is, relatively to the whole tooth, perhaps a little larger than in the central incisors ; in other respects the same description will suffice. Lower Central Incisors are very much narrower than those of the upper jaw ; not more than half the width at their