Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1996-05-13
1998-04-28
Weiss, John G.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
623 18, 623 66, 606102, 128898, A61B 1756
Patent
active
057439184
ABSTRACT:
A method of and instrumentation for implanting a spherical prosthesis in a joint between a first bone and a second bone. The method includes the steps of exposing a joint between a first bone and a second bone; forming a semispherical cavity in the proximal surface of the first bone; forming a semispherical cavity in the distal surface of the second bone; and inserting a spherical prosthesis into the semispherical cavities in the proximal surface of the first bone and in the distal surface of the second bone.
The instrumentation includes cutting instrument including a cutting instrument head having the shape of a segment of a sphere with at least one truncated end or side, and a shaft attached to the cutting instrument head for allowing the cutting instrument head to be inserted between the proximal end of a first bone and the distal end of a second bone, and to be then at least partially rotated about a rotational axis generally transverse to an axis or plane extending through the center of the segment of a sphere substantially perpendicular to the plane of the surface of the truncated end or side thereof.
The instrumentation also includes a trial instrument with a trial instrument head having the shape of a segment of a sphere for being inserted into the semispherical cavities in the proximal end of the first bone and the distal end of the second bone.
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Metcalfe, J. W.: "Vitallium Sphere Prosthesis for Nonunion of the Navicular Bone"; Journal of the International College of Surgeons, 22: 459-462, 1954.
Legge, R. F.: "Vitallium Prosthesis in the Treatment of Fracture of the Carpal Navicular"; The Western Journal of Surgery,Obstetrics & Gynecology, 59: 468-471, Sep.1951.
Calandruccio James H.
Jobe Mark T.
Cuddihy Francis K.
Weiss John G.
Wright Medical Technology Inc.
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