Abstract
We reviewed eight posterior-stabilized total knee arthroplasties in six selected patients in which a surface arthroplasty could not suffice. The mean follow-up period was 1.7 years. There were one man and five women. The mean age at the operation was 73.8 years. There were four primary arthroplasties and four revisions. The diagnosis was osteoarthritis in six knees and rheumatoid arthritis in two. The maximal extension improved from- 28.8 degrees to -9.4 degrees. The maximal flexion was 110.0 degrees before the operation and 110.6 degrees at the latest follow-up. The average JOA score for osteoarthritis improved from 55.8 to 79.2. There were no cases of anterior/posterior or medial/lateral instability. A transient pulmonary embolus was found in one patient but no other complications were observed. The indications of posterior-stabilized prosthesis are severe varus deformity with massive bone defect in the medial tibial plateau, flexion contracture, and cases of unstable revision.
