A system of dental surgery / by John Tomes and Charles S. Tomes.

  • Tomes, John, 1815-1895.
Date:
1897
Catalogue details

Licence: Public Domain Mark

Credit: A system of dental surgery / by John Tomes and Charles S. Tomes. Source: Wellcome Collection.

    185/776 (page 173)
    sides of the month, consistent with ;i well-developed denture. The case figured at page 148 illustrates the condition, and indeed shows an indentation in the arch at the points of junction of the molar and bicus])id teeth, the origin of which has been already ex])lained (page 148). Although not a common cause, cases may ho found in which disease in the temporary molars, and subsequent alveolar abscess, have occasioned the displacement of the bicuspids. In the case figured at page C9, the first bicuspids have been driven outwanls by disease about the first tem- jiorary molars. Like the teeth in the fnuit of the mouth, the bicusjnds may be diverted from their i>roper position by the persistence of temporary teeth. When one only of the two bicuspids is involved, we shall generall}^ find the second bicuspid to be the misplaced tooth. In that case, the mischief may have been produced either by want of sufficient space for a regular arrangement, or from the ))resence of the whole or a jiart of its jiredcccss(jr. IVhen the former cause has led to the deformity, the degree of disjjlacement will vary in accordance with the amount of contraction of the allotted space. 'I’lius, when the first bicuspid and -first molar are closely approximated, the second bicuspid or premolar coimnonly comes through the gum internally to the arch. It is far from uncommon t<j find the latter tooth, twisted ujxm its axis by the presence of the lingual root of the second temporary molar, wedged between the first jierrna- nent molar and the former tooth. In a succeeding figure (Fig. G9), the second bicus]>id is comjiletel}^ turned round, so that the lingual has become the labial surface, and in this case the labial root of the temporary tooth has been retained. In determining upon the course of treatment, we must be guided, in the first jilace, by the condition of the jaw. If the base is contracted, it will bo necessary to remove a tooth ; but should the teeth be turned inwards, and their outward