Abstract: [Abstract] Objective To summarize the operation techniques and experience of arthroscopic “piecrustiong” release for patellofemoral joint hypertension.Methods From August 2021 to April 2023,67 patients (75 knees) suffered from isolated patellofemoral compression syndrome.The lateral retinacular of knees were arthroscopic released by pie crusting technique.All knees were assessed by AKS and Kujala scores.Results The follow-up period ranged from 3 to 18 months.All patients had good wound healing without infection, joint hematosis, fluid accumulation, and limited movement.AKS score of knee joint was (44.88±5.49)points before surgery and (69.57±4.64)points 3 months after surgery. Kujala score was (47.08±6.28)points before surgery and (68.75±4.47)points 3 months after surgery. The Vas score was (2.81±0.67)points before surgery and (0.85±0.65）points 3 months after surgery.The AKS, Kujala and Vas scores of knee joint after treatment were higher than those before treatment, and the differences were statistically significant ( P < 0.05).Conclusion The treatment of arthroscopic “pie-crusting” technique can improve the patellar joint matching degree, relieve pain and improve quality of life.

Key words: arthroscopic surgery, lateral retinacular release, piecrusting； patellofemoral joint hypertension