Luxation of the prosthesis is substantially under the control of the surgeon. It is recommended that the acetabular cup be inserted at an angle of lateral opening of 35 degrees to 45 degrees. In those cases of THR luxation in which an inappropriate angle of lateral opening is identified, acetabular revision arthroplasty generally results in a good clinical outcome.
Case histories of 130 dogs and cats with humeral fractures were reviewed. The different types of fractures were classified. Most animals with proximal, shaft, and supracondylar fractures had excellent results. The poor prognosis associated with distal articular fractures was due most often to failure of the fixation device in the supracondylar area; best results were achieved with a plate on the caudal and medial surface of the distal humerus. R O X I M A L A N D MIDSHAFT HUMERAL fractures in P veterinary patients have been repaired with in-
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