Surgery – Instruments – Orthopedic instrumentation
Reexamination Certificate
2005-07-26
2005-07-26
Philogene, Pedro (Department: 3732)
Surgery
Instruments
Orthopedic instrumentation
C606S104000
Reexamination Certificate
active
06921402
ABSTRACT:
An orthopedic screw with an internal bore and mating driver has a bioabsorbable polymer component. To increase the torque tolerance of the screw and to minimize the likelihood of the driver stripping inside the bore of the screw, the screw and driver are heat treated together to shrink fit the screw onto the driver thereby increasing the driver-to-screw contact and distributing the loading force over a greater area to protect against material failure. The heat treatment involves heating the screw to an elevated temperature and holding that temperature for a period to promote stress relaxation and/or crystallization of the material.
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Contiliano Joseph H.
Tenhuisen Kevor S.
Yuan J. Jenny
Ethicon Inc.
Philogene Pedro
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