Questions and answers embracing the curriculum of the dental student : divided into three parts / by Ferdinand J.S. Gorgas.

  • Gorgas, Ferdinand J. S. (Ferdinand James Samuel), 1835-1914.
Date:
1902, ©1901
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Licence: In copyright

Credit: Questions and answers embracing the curriculum of the dental student : divided into three parts / by Ferdinand J.S. Gorgas. Source: Wellcome Collection.

Provider: This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.

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    fronts for roots capped), and base ground from a line on palatal surface below pins, straight to labio-cervical edge, to form self-cleansing spaces ; back incisors with thin platinum or pure gold, and allow back- ings to extend just over cutting edge, as a protection, and to edge of self-cleansing space ; back the bicuspid and molar fronts in same man- ner after grinding off their tips ; then strike up a cap of pure gold, or gold and platinum, to represent grinding surfaces, and fill concave por- tion by melting in scraps of gold ; then grind surface smooth and fit to tip of porcelain front to form occluding surface according to articula- tion with lower teeth, and fill space with wax; this metal surface pro- tects the porcelain; then cut and fit to sides triangular pieces of gold plate or platinum foil; let them extend slightly over sides, and invest tooth, leaving back open like a pocket, the end of bridge on left side is to be anchored in a slot cut in the molar; this bar is made of iridio- platinum wire filed square, adjusted to tooth and cap with wax and tried in mouth ; invest all the incisors, and the porcelain fronts of cuspid crowns, at same time ; and in soldering melt twenty carat gold plate into the pockets, and flow gold over backings of incisors and cuspid fronts sufficient to shape them, then trim and finish each tooth ; then attach teeth on model with wax and apply investment of marble dust two parts, plaster one part, until all the bridge is covered except space along backings and crowns where they are to be united in solder- ing ; place in space between backings, pieces of gold or platinum plate and solder over these ; then finish with wheels and points. Q. How is such a bridge adjusted In mouth ? A. By first trying in and arranging articulation, then permanently attach bridge by first barbing the posts, and cement the crowns on with oxyphosphate of zinc, and anchor end of bar in slot of right first molar by either a gold or amalgam filling. Q. How are small pieces of Bridge-work constructed, (Dr. G. Evans) ? A. First make crowns for anchorage teeth or roots, and temporarily place in position; grind and back the teeth, adjust them, cement with resin and wax in proper position between the crowns; then remove crowns and teeth together in an impression cup filled with investment; the inside surface of cup should be serrated and coated with wax ; then warm impression cup and remove its contents; cover exposed parts of crowns and teeth with more investment, and expose parts to be filled in and soldered ; solder and finish. O. What are Removable Plate Bridges 1