Fifty-one Avon PFJ (Stryker, Mahwah, NJ) isolated unicompartmental arthroplasties (47 patients; 29 men, 18 women) were identified at a mean follow-up of 7.1 years (range, 5-11 years). The average age at surgery was 57 years (range, 37-69 years).
All patients reported excellent pain relief, satisfaction, and functional outcomes. Median Oxford Knee Score was 38 at latest follow-up with a significant improvement from preoperative scores (P < .0005). There were 2 revisions: 1 for pain and 1 for progression of OA. The probability for survival (Kaplan-Meyer analysis) with revision as end point was 96.1%.
The study has shown good midterm results for Avon PFJ (Stryker, Mahwah, NJ) system in posttraumatic PFJ OA, at midterm follow-up in a relatively young patient cohort.