Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Implantable prosthesis – Bone
Patent
1998-12-09
2000-12-19
Hirsch, Paul J.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Implantable prosthesis
Bone
623 1811, A61F 238
Patent
active
061622532
ABSTRACT:
The present invention is directed to novel two piece total elbow arthroplasty systems. In particular, the present invention is directed to total elbow implants, bone cutting guides for the installation of the implants, and methods for total elbow replacement. The apparatus and methods of the present invention are useful in the treatment of elbow osteoarthritis in canines, as well as in other species, including other quadrupeds and humans. The two piece implant of the present invention has an isometric humeral component and a radioulnar component that has an isometric articular surface. The components have stems for mounting in the medullary canals of the respective bones, which are angled so as to approximate the configuration of the original humerus, radius and ulna. In addition, novel cutting guides are provided to facilitate the removal of arthritic cartilage and a minimal amount of adjacent bone, thereby allowing the implantation of the two components (humeral and radioulnar), which are held in place by cement, such as polymethylmethylacrylate (PMMA). The result is a pain-free joint that has a near normal range of motion. Finally, the invention is directed to methods for implanting the novel endoprosthesis of the present invention in a canine elbow joint.
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Photograph of multicomponent elbow endoprosthesis designed by Dr. Phil Vasseur et al. at the University of California at Davis, and believed to be in use on or before Dec. 1997.
Aper Rhonda L.
Conzemius Michael G.
Hirsch Paul J.
Iowa State University & Research Foundation, Inc.
Priddy Michael B.
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