Midterm Outcome of Avon Patellofemoral Arthroplasty for Posttraumatic Unicompartmental Osteoarthritis.

Journal of Arthroplasty

PubMedID: 27522543

Konan S, Haddad FS. Midterm Outcome of Avon Patellofemoral Arthroplasty for Posttraumatic Unicompartmental Osteoarthritis. J Arthroplasty. 2016;.
BACKGROUND
Patellofemoral arthroplasties have been successfully used in the management of isolated patellofemoral joint (PFJ) osteoarthritis (OA). We hypothesized that in posttraumatic PFJ OA, isolated unicompartmental arthroplasty should be associated with reliable pain relief, patient satisfaction, and functional outcome at midterm follow-up.

METHODS
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).

RESULTS
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%.

CONCLUSION
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.