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Animal model preparation, The articular cartilage defect was replaced with acellular dermal matrix, Naringin is taken orally ----- The flow chart. (A) Full exposure of joint surface; (B) Drill holes from the femoral condyle to the subchondral bone at the trochlear articular surface;(C) Articular cartilage defect, a diameter of 5mm and a depth of 3mm;(D) Implant acellular dermal matrix into the articular cartilage defect.
