Patent
1973-08-08
1976-01-20
Kinsey, Russell R.
32 11, A61C 1300
Patent
active
039329399
ABSTRACT:
A dental model cast includes an impression of at least one tooth and a substantially flat surface opposingly disposed relative to the tooth impression. The dental model cast is in the form of a plurality of segments. Each of the segments is removably mounted on a base cast and can be replaced in their original positions thereon. Extending from the flat surface of each segment is an elongate brass pin which is provided with a tapered free end. Each segment is also provided with a shorter tapered or conical pin which is made from an elastomeric material such as polyethylene. The base casting is provided with a polyethylene sleeve configurated to receive a portion of the tapered brass pin which extends beyond the flat surface. A tapered or conical opening is provided in the base cast which is configurated to receive the shorter tapered pin. The brass pin acts as a locating pin which initially engages and locates the opening in the sleeve while the shorter tapered pin acts as an alignment pin which is received in the tapered opening in the base cast to align and fix the position of the dental model cast relative to the base cast. The pins forming part of the prosthodontic cast model as well as the method of forming the latter is also described.
REFERENCES:
patent: 2655724 (1953-10-01), Brooks
patent: 2705837 (1955-04-01), Gerlach
patent: 3704519 (1972-12-01), Lystager
Kinsey Russell R.
Lever J. Q.
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