The practical manual of dental casting : being the recorded experiences of many able and eminent men in the dental profession.

Date:
1913
Catalogue details

Licence: In copyright

Credit: The practical manual of dental casting : being the recorded experiences of many able and eminent men in the dental profession. 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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    ich instantly mduces congealation; and as they are held firmly against the mold, gaps and crevices occur, which are, however, filled by the ind, and with inconceivable rapidity, with new recruits, frenzied and heat-maddened, where they meet the same fate as their fellows, crushed and jammed against each other and the walls of the mold until in congealing a rigid wall or capsule lines every surface and angle of the mold. (See Fig. 4.) This goes on in the same way until the surface crust thickens to the center, all following the same regular order of things, but with no loss of appreciable time, in a small mass of gold as might be inferred from the deliberate description. This metal will be found to be of higher specific gravity than when it is allowed to cool under ordinary conditions. A pressure of 12 pounds induced by expanding gas will bring about a density or specific gravity of 19.45. No. 1. A piece of metal for the band is cut from 30-gauge coin gold, the oc- clusal end being 1-32 of an inch smaller than the gingival. No. 2. Showing the band joined sweated. No. 3. The floor sweated to the band. No. 4. The core is formed by holding the inner cap in a paper form ami pouring fusible metal into it. No. 5. The outer cap is made by driving the inner cap, now mounted on the core, into it. No. 6. Shows method of obtaining contour. TELESCOPIC CROWN FOR BRIDGE WORK By E. L. Kanaga, D.D.S., Philadelphia, Pa.