Orthodontia, or malposition of the human teeth : its prevention and remedy.

  • Guilford, Simeon Hayden, 1841-1919.
Date:
[1893]
Catalogue details

Licence: Public Domain Mark

Credit: Orthodontia, or malposition of the human teeth : its prevention and remedy. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    The case had previously been in the hands of two den- tists, who began operations for correction, and it therefore became necessary for the author to carry it forward to completion. Had he been consulted in the beginning, he would have advised non-interference until two years later when the cuspids would have been partially erupted, and more nearly ready to assume their places in the arch, as soon as room was provided. In this way the wearing of a retaining plate, to await the full eruption of the cuspids, would have been avoided and the case simplified. Prof. Angle has devised a neat and effective appliance, constructed entirely of metal, for the lateral expansion of the arch, as shown in Fig. 126. Like the Jackson appliances, it utilizes the principle of the Coffin spring without the objectionable features of the rubber plate. It can be used in either the upper or lower arch and where no greater power than the spring affords is needed, will prove very efficient. As seen in the cut, a rubber ligature may be attached to the centre of the spring and be con- Laterai Expansion. (Angle) nected with any cross-bar appliance upon the incisors for drawing them inward when such additional movement is desired. Fig. 126.