Sterndent Corporation

Other

Eric H Zahn

Philip W Martin

Dental and other intricate technique-models to be invested in compatible plastic material have a reduced tendency to float through the association herewith of a foreign body that increases the relative weight of the model as compared with the investment material.

Non-floating technique-male

A two-part stress-reliever employs a first member supporting an upright flange and a second member bifurcated and straddling said flange. An elongated slot in the flange receives a pass-through pivot pin carried by the second member and said slot also includes a resilient body biasing the pivot pin to its normal unstressed position in said slot.

Dental stress-relieving apparatus

A rotatable mandrel is provided for stippling various surfaces, including the surface of plastic material, and is disclosed as comprising a cluster of burrs symmetrically arranged about the axis of rotation of the mandrel.

Growing community of inventors

Bellevue, WA, United States of America

Eric H Zahn