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Unsatisfactory results with a ceramic total hip prosthesis
OM Mahoney; JH Dimon
J Bone Joint Surg Am, 1990 Jun 01;72(5):663-671
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Abstract

We reviewed the results of forty-two total hip replacements that had been done with the self-locking Autophor ceramic total hip prosthesis in thirty-four patients. The patients ranged in age from twenty-five to sixty-seven years (average, forty-eight years). The diagnoses were avascular necrosis (eight patients), degenerative arthritis (nineteen patients), ankylosing spondylitis (one patient), post-traumatic arthritis (two patients), and rheumatoid arthritis (four patients). Seven procedures were revisions: five, of a loose cemented total hip prosthesis and two, of a loose noncemented endoprosthesis. No revision was done for infection. The length of follow-up ranged from twenty-seven to sixty-six months (average, fifty-one months). The patients were evaluated by physical examination, serial radiographs, and questionnaires. The hips were rated with the modified Harris hip score. At the time of follow-up, eleven of the twenty-seven patients who had had a primary hip replacement complained of at least moderate pain that limited activities; however, only three patients had to have a revision. The femoral components had a notable tendency to subside more than five millimeters, and in fifteen hips there was radiographic evidence of progressive loosening. Our experience with the self-locking Autophor ceramic total hip prosthesis has been disappointing. We no longer use it.

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    Accreditation Statement
    These activities have been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education (ACCME) through the joint sponsorship of the American Academy of Orthopaedic Surgeons and The Journal of Bone and Joint Surgery, Inc. The American Academy of Orthopaedic Surgeons is accredited by the ACCME to provide continuing medical education for physicians.
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