Apparatus and method for making bridgework

Details Apparatus and method for making bridgework Apparatus and method for making bridgework

1977-06-29

1979-12-04

Lake, Roy

Metal founding

Process

Shaping a forming surface

433200, B22C 904, A61C 1322

Patent

active

041767063

ABSTRACT:
The specification discloses a tooth-shaped member including a central insert which is removable from a facing in order to make the supporting framework for a dental bridge. An appropriate size and shape of a tooth-shaped member is selected and aligned in a gap between built up wax crowns of abutment teeth. The insert extends across the facing and is adhesively bonded at the ends thereof to the adjacent wax crowns. The facing is then removed from the insert. The wax crowns are cut down to the desired shape and the insert and crowns are removed as a single unit. The unit is then cast to form a bridge framework which is coated with porcelain to form artificial teeth.

REFERENCES:
patent: 1407557 (1922-02-01), McVicker
patent: 1465473 (1923-08-01), Hansen
patent: 1523569 (1925-01-01), Wilson
patent: 1742310 (1930-01-01), Floyd
patent: 2087047 (1937-07-01), Scheven
patent: 2196505 (1940-04-01), Morton
patent: 2315669 (1943-04-01), Tamarin
patent: 2431086 (1947-11-01), Saffir
patent: 3971133 (1976-07-01), Mushabac

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