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

Date:
1904
Catalogue details

Licence: In copyright

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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    Iii both upper and lower jaws the incisors form a single pair of large curved teeth, growing from persistent pulps, and wearing obliquely so as to constantly preserve a sharp cutting edge. The enamel is very much less thick, if not altogether absent, upon the backs of the upper incisors, but the lower incisor, which is very narrow from side to side, and very thick from back to front, is composed very largely Fig. 252 (*). of enamel, the dentine constituting a comparatively small part of it. After a considerable interval, which is devoid of teeth, there follow four upper and three lower teeth, which are not of persistent growth, but have definite roots, and resemble the molars of many omnivorous rodents. Although, functionally, its teeth are those of a rodent, yet, despite this adaptive resemblance, the milk dentition retains (*) Upper and lower jaws of Chiromys. .A. Milk dentition, with the permanent incisors just emerging, i, l. Upper and lower permanent incisors, i 2, l 2. Upper and lower milk incisors, c. Milk canines. d 1, d 2, d a, d b. Upper and lower milk molars. (Twice natural size.) B. Reduced figure of permanent teeth. (After Peters.)