Handbook of dental anatomy and surgery : for the use of students and pratitioners / by John Smith.

  • Smith, J. (John), 1825-1910.
Date:
1864
Catalogue details

Licence: Public Domain Mark

Credit: Handbook of dental anatomy and surgery : for the use of students and pratitioners / by John Smith. Source: Wellcome Collection.

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    assumed by these fangs—will at once indicate the impossibility of removing the teeth from their sockets by a straight pull. On the other hand, the thinness of the external alveolar wall—coupled with the fact that, like the stones forming an arch, the fangs of all teeth are thickest on their outer aspect—indicates that a force applied so as to dislodge the teeth in an outward direction, will tend very materially to facilitate their removal. In the same manner, the soft and spongy texture of the transverse partitions of the alveolar ridge renders it apparent how, in using the elevator or tooth-punch, a root or stump will be easily extruded, on these walls or partitions yielding before the power of such an instrument when properly directed. The disadvantages, again, attending an unacquaintance with such matters are too obvious to require any comment here. The anatomical configuration of the teeth themselves, implanted in the upper and lower maxillce, differs very much among the individual members of the series, and according as they are temporary or permanent. The four incisors of the upper jaw are single-fanged teeth, and they differ from the corresponding teeth of the lower jaw, inasmuch as, while the upper ones c