The teeth / by James W. White.

  • White, James W.
Date:
1880
Catalogue details

Licence: Public Domain Mark

Credit: The teeth / by James W. White. Source: Wellcome Collection.

Provider: This material has been provided by the University of Toronto, Harry A Abbott Dentistry Library, through the Medical Heritage Library. The original may be consulted at the Harry A Abbott Dentistry Library, University of Toronto.

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    lower hall of the mold holes are drilled 1o receive the platinum pins which serve to con- nect the teeth with the plate to which they a-re to be attached. The pins of proper length and thickness having been adjusted, the enamels are carefully laid in, by means of small steel spatulas, in the exact position and quantity required. The body is then placed, in lumps corresponding to the size of the tooth; the top of the mold is put on, and it is subjected to pressure, which compacts the masses in the matrices. They are then dried by a slow heat. When perfectly dry, the top is removed, and the teeth will drop out. In this state they are very tender, and require careful handling. They are now passed to the trimmers, by whom each tooth is carefully inspected, all imperfect ones being thrown out. The edges and the arch of the gum are smooth- ly filed and trimmed, and they are then placed on trays or slides of fire-clay, and are ready for the furnace. In the centre of this furnace there is ainufflc or oven of fire-clay, entirely surroundcMl by tiic glowing fuel. The slides containing the teeth are placed in thismuflle, and, according to the intensity of the fire, are allowed to remain from ten to tl^irty minute»s, until the exact point of fusion is reached,