Variable angle bone fixation device
AssigneeDePuy Synthes Products, Inc.
InventorsKenny Chi Beng Koay, Roderick Daniel McMillan, Kenneth Isamu Kobayashi, Rene Haag, Robert Limouze, Mike Wahl, Mirko Rocci
Life of this patent
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Abstract
A bone fixation element includes a threaded head and a shaft extending along a longitudinal axis from a proximal end to a distal end, an outer surface of the head being one of carburized and nitrided and including a first groove extending into an outer surface of the head along a path interrupting the threading and extending along an angle counter to an angle of the threading.
Claims30
A system for bone fixation, comprising:
- an elongated bone implant having a shaft configured for insertion into a bone in an operative configuration, an outer surface of the bone implant being one of carburized and nitrided and having a first hardness;
- and
- a bone fixation plate having an opening extending therethrough from a first surface configured to contact the bone in an operative configuration to a second surface located opposite the first surface, the opening being configured to receive the bone implant therethrough, the bone fixation plate having a second hardness;
- wherein the first hardness is greater than the second hardness, the first hardness being in the range of 67-74 HRC.
A bone fixation element comprising a threaded head and a shaft extending along a longitudinal axis from a proximal end to a distal end, an outer surface of the head being one of carburized and nitrided and including a first groove extending into an outer surface of the head along a path interrupting the threading and extending along an angle counter to an angle of the threading.
A bone fixation system, comprising:
- a bone fixation element comprising a threaded head and a shaft extending along a longitudinal axis from a proximal end to a distal end, an outer surface of the head being one of carburized and nitrided and including a first groove extending into an outer surface of the head along a path interrupting the threading and extending along an angle counter to an angle of the threading;
- and
- an elongated bone plate extending along a plate axis and having a plate hole extending therethrough from a first surface to a second surface configured to contact a bone in an operative configuration.
A method for treating a bone, comprising:
- placing a bone fixation device over a target bone, the bone fixation device extending along a plate axis and having a hole extending therethrough from a first surface to a second surface configured to contact the bone in an operative configuration;
- and
- inserting a bone fixation element through the hole and into the bone, the bone fixation element comprising a threaded head and a shaft extending along a longitudinal axis from a proximal end to a distal end, an outer surface of the head being one of carburized and nitrided and including a first groove extending into an outer surface of the head along a path interrupting the threading and extending along an angle counter to an angle of the threading.
Dependencies are inferred from the claim text.