Specification of William Edward Newton : compound and mould for artificial teeth.

  • Newton, William Edward.
Date:
1868
Catalogue details

Licence: Public Domain Mark

Credit: Specification of William Edward Newton : compound and mould for artificial teeth. Source: Wellcome Collection.

    5/18 (page 3)
    Provisional Specification. A.D. 1868.—N” 536. 3 Neioton's Improved Compound and Mould for Artificial Teethe some soft fusible metal. This mould constitutes the foundation of the dental mould to be constructed.. The casting or mould with the impression is then taken out of the flask, and the casting being placed in a reverse position a plaster form of a dental plate is built upon it in 5 which the porcelain teeth are set in their places. The mouldiwitli the second form is then put into the flask and being screwed, up small wads of clay or putty are introduced on opposite sides of the mould and between the form and the flask, leaving a space in front which is filled by casting another section. A wad of clay is also placed, behind 10 the teeth in the form to confine the sectional casting to the front side; the side pads are then removed and their spaces are filled by casting the other sections, at the same time a central core may be cast on the plaster form by placing a clay wad over the cutting edges of the teeth, or the core may be cast afterward. When 16 these several sections of the mould have been thus formed a cap piece is cast upon the core by filling the space around the teeth occupied by the pad. The section mould having been thus constructed of successive castings of the parts within the flask around the mould or form the whole is taken out of the flask together after 20 loosening it. The plaster form is broken up and the metal sections, cleaned of all adhering particles, the teeth are taken out and set aside in their regular order of arrangement. The metal sections are all replaced in the flask in their relative positions to each other but upside down in the flask with the cap piece at the bottom. When the teeth 25 are all set in their respective cavities in the mould the improved plastic • material is introduced into the mould in sufficient quantity to form a dental plate corresponding to the plaster form. The casting is then set upon it and the flask screwed up tight. A stirrup clamp or* other suitable means of exerting pressure upon the opposite castings is then 30 applied and the solvents are squeezed out, partly by a moderate pressure at first, and the material is forced into all the interstices between and around the teeth to form a continuous gum. In the same manner* material formed of the dried residuum of collodion and its compound,, comminuted or reduced to a powder and made plastic by slight saturation 35 with proper solvents, may be moulded under pressure to solid blocks or cakes of any desired size or shape suitable for various useful purposes as herein-before described.