Ninety patients are involved in this study, who underwent arthroscopic lateral patellar release for lateral patellar compression syndrome and they had patellofemoral degenerative lesion, which diagnoses by MRI preoperatively and proved by arthroscopic examination to be early stages of degenerative changes with no loss of articular surface. The patients were divided in to two groups (A and B). Group A (45 patients) were treated by local injection of Hyaluronic acid intraarticularly, and Group B (45 patients) were no injection intraarticular.
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Visual analogue score of knee pain
Timeframe: The VAS for knee pain was measured 24 months after operation
Kujala score
Timeframe: Preoperative assessment and 2 year postoperatively