The Angle system of regulation and retention of the teeth, and treatment of fractures of the maxillae.

  • Angle, Edward H. (Edward Hartley), 1855-1930.
Date:
1895
Catalogue details

Licence: Public Domain Mark

Credit: The Angle system of regulation and retention of the teeth, and treatment of fractures of the maxillae. 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.

    83/120 (page 79)
    ligatures shown in Fig. 28. If any of the teeth show tendency to lengthening, this should also be prevented by bands and notches which shall engage the arch B. IN'ever use larger liga- tures than those shown at E, E, Fig. 2, accompanying the appli- ance, for it should Ije remembered that the force necessary in moving the teeth is exerted by the heavy elastics and head-gear; but by increasing the size of the small ligatures disturbance of the anchor-teeth, such as tipping, elongating, and the establish- ment of faulty occlusion may follow, something especially to be avoided in the treatment of these cases. It should also be remembered that no moving force upon the teeth should be exerted by these merely retaining ligatures. In order to produce room for the irregular teeth, it is some- times necessary to extract one or two of the bicuspids. Where the loss of one is suthcient the moving teeth may be shifted laterally in order to fill this space, by inserting a folded hand- kerchief or a small cushion between the face and heavy elastic bands, thus exerting lateral pressure upon the traction-bar stand- ard and wire arch. The wire coiler shown at ]Sr, Fig. 8 A, is well adapted for curving the retaining-wire G, or for modifying the curves in wire arches B and E. This may thus be done without risk of breaking or roughening the smooth surfaces of the wires, as is liable to occur under the use of ordinary pliers. The new regulating pliers (H, Fig. 8 B) for elongating the several straight or curved wire appliances, will be more and more appreciated as experience shall demonstrate the general utility of the invention. A re-examination of the devices shown in Figs. 10, 24, 25, 2G, 37, 56, 70, and 71 will make obvious the fact that any section of the wire G, if inadvertently cut a little short for its designed position, may be repeatedly pinched witli the pliers until its length shall exactly correspond with its func- tion. If desirable, the wire may be so stretched while in situ, as shown and described on page -4:9. In the precise adjustment of retaining-wires the novel action of the regulating pliers is especially manifest.