Modular fracture fixation system
AssigneeBiomet C.V.
InventorsJorge L. Orbay, Javier E. Castaneda, Robert Sixto, Jr., Jose Luis Francese, Edward Mebarak, Cesare Cavallazzi
Life of this patent
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Abstract
A fracture fixation plate system for use on a long bone having a metaphysis and a diaphysis, includes at least one end plate having a head portion for the metaphysis, and at least one diaphyseal plate having a first end and a second end with a plurality of screw holes therebetween. The end plate includes mating structure adapted to mate with and securely couple to at least one end of the at least one diaphyseal plate. The system preferably includes several end plates and diaphyseal plates to accommodate anatomy of various sizes.
Claims21
A fracture fixation plate system for use on a long bone having a metaphysis and a diaphysis, comprising:
- a) a first plate including a socket and first and second upper screw holes, and an upper set screw hole for receiving a head of a set screw;
- b) a second plate including an end portion sized to be received within said socket, said end portion including first and second lower screw holes aligned relative to said first and second upper screw holes, and a lower set screw hole having threads for receiving a shaft of a set screw, said lower set screw hole aligned relative to said upper set screw hole;
- c) first and second bone screws each having a head and a shank with bone engaging threads, wherein said head of said first bone screw can pass through said first upper screw hole and seat within said first lower screw hole;
- and
- d) a set screw for coupling said first and second plates together at said upper and lower set screw receiving holes.
A fracture fixation plate system for use on a long bone having a metaphysis and a diaphysis, said system for use with a bone screw having a head and a shaft with bone engaging threads and a set screw having a head and a shaft with machine threads, the system comprising:
- a) a first plate having a stem portion and a head portion angled relative to said stem portion, said stem portion including a bone contacting side, an opposite upper side, a socket below said upper side and extending through said bone contacting side, a passing hole and a tapered eccentric screw hole,
- said passing hole extending through said upper side and into said socket and sized to permit passage of both the head and the shaft of the cortical screw completely therethrough,
- said tapered eccentric screw hole in said upper side dimensioned to retain the head of the set screw;
- and
- b) a second plate having an end portion receivable within said socket, said end portion including a bone screw hole and a threaded hole,
- said bone screw hole permitting passage of the shaft of the cortical screw but dimensioned to retain the head of the bone screw such that rotation of the bone screw causes the second plate to be clamped against the bone, and
- said threaded hole including machine threads for engaging the shaft of the set screw,
- wherein when said end portion of said second plate is received in said socket of said first plate, said bone screw hole is in alignment with said passing hole and said tapered eccentric screw hole is in alignment with said threaded hole,
- such that axial insertion of the set screw in a first direction into said tapered eccentric screw hole and said threaded hole aligned therewith causes movement of said first and second plates relative to each other in a second direction perpendicular to said first direction.
A fracture fixation plate system for use on a long bone having a metaphysis and a diaphysis, said system for use with a bone screw having a head and shaft with bone engaging threads and for use with a set screw having a tapered head and a shaft with machine threads, the system comprising:
- a) a first plate having a stem portion and a head portion angled relative to said stem portion, said stem portion including a bone contacting side, an opposite upper side, a socket below said upper side and extending through said bone contacting side, a passing hole, a tapered eccentric set screw hole, and an integrated post,
- said passing hole extending through said upper side and into said socket and sized to permit passage of both the head and the shaft of the bone screw completely therethrough,
- said tapered eccentric screw hole in said upper side dimensioned to retain the head of the set screw,
- said integrated post extending into said socket from a direction of a said upper side toward said bone contacting side;
- and
- b) a second plate having an end portion receivable within said socket, said end portion including a bone screw hole, a threaded hole, and an upper recess,
- said bone screw hole permitting passage of the shaft of the bone screw but dimensioned to retain the head of the bone screw such that rotation of the bone screw causes the second plate to be clamped against the bone,
- said threaded hole including machine threads for engaging the shaft of the set screw, and
- said upper recess for receiving said post when said end portion of said first plate is received in said socket,
- wherein when said end of said second plate is received in said socket of said first plate and said post is received in said upper recess of said second plate, said bone screw hole is in alignment with said passing hole and said threaded holes is aligned with said tapered eccentric screw hole.
Dependencies are inferred from the claim text.