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.

    9/18 (page 7)
    Newton^ s Improved Compound and Mould for Artificial Teeth, 8fC. Fig. 3 represents the next operation in constructing the moulds showing the plastic form D on the base cast or mould B placed witliin the flask A and the front sectional cast or mould E. Fig. 4 represents the next operation, showing the casts or moulds of 5 other sections; Fig. 5 represents the whole sectional dental mould when completed having one side section F removed; Fig. 6 represents one of the side sections F detached, and Fig. 7 represents the last operation of forming the dental plate in the mould. This improved dental plate mould is constructed of metal sections 10 cast separately within an adjustable metal flask, cylindrical in its form, and built and employed in such a manner that a perfect dental plate with a continuous gum surrounding or enclosing the teeth is moulded of the improved plastic material under pressm^e. An adjustable cylindrical flask A made of thin sheet metal or casting or other suitable 15 substance is made with one open side or division provided with flanges b, b, opposite each other, to be held together and adjusted by a set screw a in constructing the mould and forming the dental plate. The sectional mould is made in separate parts successively within the flask A which is first closed tight with a set screw a and being placed on a 20 plane surface on one end receives an impression of the gums B formed of plaster in the usual manner. The impression B is put in the bottom of the flask, as shown in Fig. 1, and the mould G is then cast upon the plaster form B by pouring in some soft fusible metal; this mould G constitutes the foundation of the dental mould to be constructed. The 25 casting or mould C with the impression B is then taken out of the flask (which is loosened for the pm?pose) and the casting being placed in a reverse position, as shown in Fig. 2, a plaster form D of a dental plate is built upon it in which the porcelain teeth are set in their places. The mould C with the form D is then put into the flask, as shown in 30 Fig. 3, and being screwed up small wads of clay or putty c, c, are introduced on opposite sides of the mould and between the form D and the flask leaving a space in front which is filled by casting another section E. A wad of clay is also placed behind or on the inside of the teeth in the form D to confine the sectional casting E to the front side, 35 The side pads c, c, are then removed and their spaces are filled- by casting the sections F, F, Fig. 4. At the same time a central core G may be cast on the plaster form D by placing a clay wad d over the cutting edges of the teeth, or^the core G may be cast afterward. When these several sections of the mould have been thus formed the wad d is