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Postoperative Alignment of Total Knee Replacement Its Effect on Survival

RITTER, MERRILL, A.; FARIS, PHILIP, M.; KEATING, E., MICHAEL; MEDING, JOHN, B.

Clinical Orthopaedics and Related Research: February 1994 - Volume 299 - Issue - p 153–156
SECTION I: SYMPOSIUM: PDF Only
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Four hundred twenty-one posterior cruciate condylar total knee arthroplasties were performed between 1975 and 1983. Anatomic alignment of the knee was recorded on follow-up evaluations from two months to 13 years postoperatively. Patients were stratified into a normal group that was 5° to 8° anatomic valgus, a varus group that was from 4° anatomic valgus to any degree of varus, and a valgus group that was more than 9° anatomic valgus. There were eight failures, five in the varus group and three in the normal group. There were no failures in the valgus group. Kaplan-Meier survival curves showed no significant difference between normal and valgus groups; however, there was a statistical difference between the valgus and varus and the normal and varus groups. A surgeon should align a total knee prosthesis in neutral or a slight amount of anatomic valgus to give the patient the best chance for long-term survival.

From the Center for Hip and Knee Surgery, Mooresville, Indiana.

© Lippincott-Raven Publishers.