Method of making dental copings

Details Method of making dental copings Method of making dental copings

1988-04-14

1990-07-31

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Dental shaping type

Tooth forming

264554, 425388, A61C 1308, B29C 5110, B29C 5118

Patent

active

049449010

ABSTRACT:
A method for producing dental copings using a vacuum tray permits the making of a large number of copings simultaneously using a single sheet of plastic material. Vacuum is applied to the perforated bottom of a box-like tray partially filled with a die retaining medium such as lead shot. Dies are held in position by being embedded in the lead shot and extending above the lead shot. A frame holds a sheet of heat-softenable plastic material, which is heated from above. The frame is lowered onto the shot-containing tray and the vacuum draws the heat-softened plastic material down over the field of dies, producing copings on all the dies simultaneously.

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patent: 4270892 (1981-06-01), Faunce
patent: 4567932 (1986-02-01), Hollenbach

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