Apparatus for obtaining improved dental castings

Details Apparatus for obtaining improved dental castings Apparatus for obtaining improved dental castings

A - Human Necessities

61

C

83/2

A61C 19/00 (2006.01)

Patent

CA 1248790

ABSTRACT OF THE DISCLOSURE Apparatus and method for obtaining improved dental castings accord- ing to the lost wax method. The apparatus comprises an expandable in- vestment ring having a removable base. Formed on the top surface of the base, and within the void defined by the ring, is an indexed sprue former. A curved runner bar having an indexed coping formed at one end thereof in mating relation to the sprue former is also disclosed. By virtue of this apparatus extremely accurate base metal castings may be obtained. The apparatus is also useful for preparing precious metal cast- ings.

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