A system of dental surgery / by the late Sir John Tomes.

  • John Tomes
Date:
1897
Catalogue details

Licence: Public Domain Mark

Credit: A system of dental surgery / by the late Sir John Tomes. Source: Wellcome Collection.

    93/764 page 81
    the necks of otherwise normal teeth. Practitioners sometimes seize upon such a cusp, believing it, I presume, to be a supernumerary tooth, and drag out, not only the cusp, but the incisor from which it arose. The case from which the following illustration (Fig. 46) is taken occurred in my own practice. A large nodule or cusp projected from the neck of the tooth. It was perfectly covered by the gum, so that its presence could not be sus- pected, until, in passing the forceps up towards the neck of the tooth, some unusual obstruction was felt. Supplemental cusps only have been spoken of, but we some- times see a tolerably perfect little tooth growing out, as it were, from the side of another tooth. In Fig. 47 a small tooth is shown connected with the distal side of the second or third lower molar below the termination of the enamel. In the museum of the Odontological Society is a molar from the lateral surface of the crown of which a minute but well- formed supplemental tooth projects at a right angle. A very common deviation from the normal type is to be seen in the upper molar teeth, in which the cusp which lies behind the oblique ridge is stunted or even absent, so that the tooth becomes practically tricuspid instead of quadricuspid. This occurs especially in the second upper molars, and is more common in the higher races of mankind than in the lower (“Topinard L’Anthropologie,” 1892). It is not, however, so far as I know, correlated with any abnormality of the roots. x (*) (*) A permanent tooth, with a large nodule of enamel attached to the neck below the point covered by the edge of the gum. (') A lower molar, with a small tooth projecting from its side. D.S. G
    digitised image 1
    digitised image 2
    digitised image 3