Dentistry – Apparatus – Broach
Reexamination Certificate
2007-06-05
2007-06-05
Lewis, Ralph A. (Department: 3732)
Dentistry
Apparatus
Broach
C433S224000
Reexamination Certificate
active
10996100
ABSTRACT:
A method for overmolding a plurality of polymers having different properties onto a dental instrument. The method involves providing a dental instrument substrate made of metal, overmolding a first polymer onto a portion of the dental instrument substrate, and then applying a second polymer over a portion of the first polymer. The first polymer, which is advantageously rigid, is overmolded so that an exposed outer surface of the first polymer corresponds to a portion of the dental instrument to be gripped within a collet of a dental hand piece for powered use. The second polymer, which is advantageously soft and flexible, is applied so that an exposed outer surface of the second polymer corresponds to a portion of the dental instrument to be gripped by a dental practitioner for manual use.
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Lewis Ralph A.
Ultradent Products Inc.
Workman Nydegger
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