Surgery – Instruments – Orthopedic instrumentation
Patent
1989-04-28
1991-08-20
Isabella, David J.
Surgery
Instruments
Orthopedic instrumentation
623 16, A61F 504, A61F 230
Patent
active
050411187
ABSTRACT:
A femoral broach for preparing an intramedullary canal for receiving a stem of a fermoral hip prosthesis is provided which comprises a body having posterior, anterior, medial and lateral faces, and divided generally into proximal and distal sections, the body having a shape corresponding substantially to the shape of the stem, the latter shape defined in part by a first curve along the posterior face, a second curve along the proximal portion of the anterior face, and a third curve along the distal portion of the anterior face. Each of the first, second and third curves are generated from different centers. A plurality of cutting teeth are provided on selected portions of said posterior, anterior, lateral and medial faces, the teeth including a first plurality of teeth extending substantially horizontally about the posterior, anterior, medial and lateral faces, and a second plurality of teeth extending substantially diagonally relative to the first plurality of teeth, about the posterior, anterior, medial and lateral faces. The body is also formed with a blank surface formed in the distal portion of the anterior and lateral faces, and a pair of generally vertically extending clearance channels formed in the blank surface in the lateral face. There is also provided a trunnion having a substantially U-shaped recess facing radially outwardly relative to the peripheral surface of the trunnion to facilitate mounting of the broach to a broach insertion tool.
REFERENCES:
patent: 4306550 (1981-12-01), Forte
patent: 4552136 (1985-11-01), Kenna
"Implant Technology, Inc. LSF . . . Total Hip System", Product Information Catalog, Howmet Orthopaedic Products Facility, Howmet Turbine Components Corporation, 1986.
"Howmedica 1982 Annual Product Catalog", Howmedica, Ind. Orthopaedics Division, 1982.
"The Total System", Zimmer.
Implant Technology Inc.
Isabella David J.
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