Patello-femoral joint implant and instrumentation
AssigneeSmith & Nephew, Inc.
InventorsChristopher F. SCIFERT, Jason S. Jordan, John H. Newman, William B. Smith
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Abstract
A system for preparing a trochlear region of a resected femur is disclosed. The system includes a reamer guide and a reamer. The reamer guide has a first arcuate portion, a second arcuate portion, a wall, a protrusion connected to the wall, a leg connected to one of the first or second arcuate portion, and a distal tip portion connected to the leg. The reamer is adapted to rotatably connect to the distal tip portion, and the reamer has a first end portion, a second end portion, and one or more flutes.
Claims20
A system for preparing a trochlear region of a resected femur, the system comprising:
- a. a reamer guide having a wall portion, a leg connected to the wall portion, and a distal tip portion connected to the leg;
- and
- b. a reamer having a central axis and adapted to connect to the distal tip portion of said reamer guide and rotate about the central axis, the reamer further being adapted to pivot about the distal tip portion and translate along the wall portion of the reamer guide.
A patello-femoral joint implant, the implant comprising:
- a. an intracondylar notch portion, a proximal portion, and a distal portion;
- b. an upper surface extending from the intracondylar notch portion to the proximal portion, the upper surface having a medial portion and a lateral portion;
- c. a lateralized groove forming a curved outer surface in between the medial portion and the lateral portion;
- d. a substantially planar undersurface connected to the intracondylar notch portion and opposite the upper surface;
- e. at least one anterior peg connected to said substantially planar undersurface;
- and
- f. at least one distal peg connected to said substantially planar undersurface.
A method of preparing a femur for a patella femoral implant, comprising the steps of:
- a. cutting a planar anterior surface;
- b. attaching a reamer guide to the planar anterior surface, the reamer guide having a wall portion, a leg connected to the wall portion, and a distal tip portion connected to the leg;
- c. connecting a reamer to the distal tip portion of the reamer guide;
- and
- d. reaming a portion of the trochlea by translating the reamer along the wall portion of the reamer guide.
Dependencies are inferred from the claim text.