Evaluation of Clinical Outcomes of Scaffold Treatment of Partial Meniscal Injuries of the Knee

Inclusion Criteria: * Acute irreparable meniscal injuries requiring partial meniscectomy or chronic meniscal tissue loss (traumatic or degenerative) greater than 25%; Intact anterior and posterior meniscal horn respectively; * Peripheral meniscal rim (1 mm or more) along the entire circumference of the involved meniscus; * Knee stability or anterior cruciate ligament injury stabilized at the time of surgery; * Male or female patients between the ages of 18 and 65 years; * Healthy contralateral knee; * Normal axial alignment of the knee (mechanical tibio-femoral angle \< 3°) * Patients treated surgically with scaffolds (Actifit) for partial meniscal defects from January 01, 2009 to December 31, 2019 Exclusion Criteria: * Patients no longer available; * Concomitant posterior cruciate ligament (PCL) injury; * Advanced cartilage injuries according to Outerbridge classification (IV); * Incorrect axial alignment of the lower limb; * Documented allergy to polyurethane; * Local or systemic infection; * History of previous anaphylactoid reaction; * Systemic administration of corticosteroids or immunosuppressive drugs within 30 days prior to surgery; * Evidence of osteonecrosis in the involved knee; * Positive history of rheumatoid arthritis, inflammatory arthritis and autoimmune diseases; * Neurological disorders or conditions that may affect the rehabilitation protocol; * Pregnancy.