Prosthetic dentistry / by James Harrison Prothero.

  • Prothero, James Harrison.
Date:
1916
Catalogue details

Licence: Public Domain Mark

Credit: Prosthetic dentistry / by James Harrison Prothero. Source: Wellcome Collection.

    258/1222 (page 232)
    in modeling compound, omitting the reheating steps pre- viously mentioned. From this impression a cast is secured and a tin base swaged as described. This base is trimmed to correct peripheral outline and tested by trial in the mouth. A thin layer of softened modeling compound not more than one-sixteenth of an inch thick is laid evenly over the interior of the baseplate, which now is to serve also as an improvised impression tray. An impression, worked out by reheating and the various corrective steps previously mentioned, is secured, and all excess carefully removed. This now con- stitutes an wnpression-baseplate, on which rims of wax can be built to form the wax contour model. When transferred from the mouth to the occluding frame by means of the face bow, instead of dropping the original casts on which the metal bases were formed into the wax contour model, freshly. mixed plaster or the magnesio compound is filled in and built against the bows of the occluding frame. If oiled before forming the cast and no undercuts are present, the wax model denture will readily separate, when removed for final trial in the mouth. The advantage of this method consists almost solely in the increased stability of the wax model dentures during trial in the mouth, over temporary baseplates, of any type, adapted ~ to casts in the ordinary manner.