Dentistry – Apparatus – Having gauge or guide
Patent
1989-09-20
1990-07-10
Wilson, John J.
Dentistry
Apparatus
Having gauge or guide
433 34, A61C 1900
Patent
active
049404091
ABSTRACT:
Tooth and jaw models comprise a base and removable tooth sections which are fastened removably by pins put into suitable holes in the base. After the production of the jaw replica positive a hole is drilled in each section of the positive and the upper parts of the pins are cemented into the holes. The positive, including the pins, is then put into a casting mold having a height equal to the length of the insertion parts of the pins. The casting mold is then filled with gypsum, so that after cutting the positive into section, the sections are non-rotatably but removably fastened in the base and can be separated easily at the visible ends of said insertion parts of the pins.
The pins have a cylindrical upper part and a profiled insertion part having a cross-shaped, star-shaped or triangular section. The prongs of the insertion parts have edges arranged parallel to one another.
The method and apparatus allow a simplified production of tooth models, maintaining the required precision and easy separation of the individual sections from the base.
REFERENCES:
patent: 3498580 (1970-03-01), Wilson
patent: 3553839 (1971-01-01), Gores
patent: 4238189 (1980-12-01), Tirino
patent: 4363625 (1982-12-01), Avaessian
patent: 4371339 (1983-02-01), Zeiser
patent: 4449931 (1984-05-01), Saito
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