The Journal of Bone and Joint Surgery, Vol 67, Issue 2 203-207, Copyright © 1985 by Journal of Bone and Joint Surgery, Inc
McKeever metallic hemiarthroplasty of the knee in unicompartmental degenerative arthritis. Long-term clinical follow-up and current indications
RD Scott, MJ Joyce, FC Ewald and WH Thomas
Forty patients with forty-four unicompartmental McKeever metallic
uncemented hemiarthroplasties were followed for five to thirteen years
(average, eight years). Thirty-nine knees had a medial and five, a lateral
arthroplasty. The age at surgery ranged from thirty-two to eight-two years
(average, sixty-seven years). At the final follow-up, 70 per cent of the
knees were rated as good or excellent. Seventy-nine per cent of the knees
in patients who were less than sixty-five years old at the time of surgery
were in these categories. Six knees (14 per cent) had required revision to
either a unicompartmental or a bicompartmental total knee replacement. The
average preoperative and postoperative knee flexion did not change, but
knees with initially poor motion improved. The average preoperative flexion
contracture of 10 degrees improved postoperatively to 5 degrees.
Complications were rare and no cases of infection, peroneal palsy, or
clinically detectable phlebitis occurred. Obesity did not seem to adversely
affect the outcome. This study indicated that the McKeever unicompartmental
metallic hemiarthroplasty can provide an attractive alternative in the
treatment of unicompartmental degenerative arthritis when proximal tibial
osteotomy is contraindicated or has failed or when the patient is too
young, heavy, or active to consider total knee replacement.
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