The survival of total knee arthroplasty in patients with osteonecrosis of the medial condyle
Ritter, M.A.; Eizember, L.E.; Keating, E.M.; Faris, P.M.
Clinical Orthopaedics and Related Research 267: 108-114
1991
ISSN/ISBN: 0009-921X PMID: 2044261 Document Number: 373538
The results of total knee arthroplasty in patients with osteonecrosis of the medial femoral condyle were examined using Kaplan-Meier survival analysis. The study included 32 osteonecrotic knees with an average final follow-up examination of 3.9 years. For comparison, 63 osteoarthrotic knees with an average final follow-up examination of 4.6 years were also analyzed. The survival rates were calculated using four distinct categories of failure: (1) revision, (2) revision or radiolucency, (3) revision, radiolucency, or pain, and (4) pain. On the basis of pain relief alone, the five-year postoperative success rate was 82% for osteonecrosis (eight knees) and 90% for osteoarthrosis (27 knees), with no significant statistical difference between the two groups.