Surgical method and tool for repairing a patella of the knee joi

Details Surgical method and tool for repairing a patella of the knee joi Surgical method and tool for repairing a patella of the knee joi

1996-10-24

1998-10-20

Isabella, David

Prosthesis (i.e., artificial body members), parts thereof, or ai

Implantable prosthesis

Bone

606 80, A61F 238

Patent

active

058240993

ABSTRACT:
A surgical method and tool for repairing a natural patella are provided. The method comprises the steps of: (a) preparing a natural patella by removing a portion thereof so as to leave a substantially convex remaining portion; and (b) fixing a patella implant onto the substantially convex remaining portion of the natural patella, the patella implant including: an upper surface for sliding over the femoral articulating member; a substantially concave under surface for fixation to the convex remaining portion of the natural patella; and a circumferential facet.
A surgical tool according to the present invention comprises a substantially concave rotatable reaming member, the concavity of the reaming member being substantially equal to the concavity of the undersurface of the patella implant. The reaming member features a bit for drilling a hole in the natural patella so as to accept a peg connected to the patella implant. Alternatively, the bit may be used for guiding the reaming member through a central pre-drilled hole in the natural patella.

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patent: 4273117 (1981-06-01), Neuhauser
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patent: 4944756 (1990-07-01), Kenna
patent: 5019104 (1991-05-01), Whiteside et al.
patent: 5246460 (1993-09-01), Goodfellow et al.
patent: 5295992 (1994-03-01), Cameron
patent: 5514141 (1996-05-01), Prizzi Jr.

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