Surgery – Instruments – Orthopedic instrumentation
Patent
1997-07-08
1999-06-22
Yu, Mickey
Surgery
Instruments
Orthopedic instrumentation
606 80, 606 81, 606169, 606170, 606171, 606178, 606179, 606180, 623 21, A61B 1716, A61B 1756
Patent
active
059138580
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.
Legg, 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.
Koh Choon P.
Wright Medical Technology Inc.
Yu Mickey
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