Surgery – Instruments – Orthopedic instrumentation
Patent
1990-06-07
1992-04-28
Hafer, Robert A.
Surgery
Instruments
Orthopedic instrumentation
606 87, A61B 1756, A61F 500
Patent
active
051083965
ABSTRACT:
An apparatus for guiding the resection of the head of a humerus is provided. The apparatus includes an intramedullary alignment member having a longitudinal axis and structured for substantial axial alignment with the intramedullary canal of the bone, one point of reference for the resection. The apparatus also includes an extramedullary alignment member and a collar rotatably mounted on the intramedullary member for rotating the extramedullary alignment member about the longitudinal axis of the intramedullary alignment member to a desired degree of retrotorsion. A cutting block and a first shaft and a second shaft in a perpendicular orientation relative to the first shaft for positioning the cutting block in a desired orientation relative to the head of the bone are also provided.
REFERENCES:
patent: 3334624 (1967-08-01), Schneider
patent: 4487203 (1984-12-01), Androphy
patent: 4667664 (1987-05-01), Taylor
patent: 4703751 (1987-11-01), Pohl
patent: 4736737 (1988-04-01), Fargie
patent: 4913137 (1990-04-01), Azer
patent: 4952213 (1990-08-01), Bowman
Cofield Robert
Lackey Jennifer
Brown Michael
Hafer Robert A.
Smith & Nephew Richards Inc.
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