Clinical Research Directory

Inclusion Criteria: * Patients active in sports, Tegner =/\>5 * Primary ACL rupture, evident from anamnesis (acute trauma, snapping sensation, swelling within several hours, feeling of instability), physical examination (positive Lachman test, anterior drawertest and/or pivot shift test), radiograph and MRl * Willing to comply to the suggested (nationwide standard) rehabilitation protocol, supen/ised by a NFVS registerd sport-physical therapist * \<6 months between initial trauma and surgery Exclusion Criteria: * History of knee surgery on the same side * History of tendon removal on the same side * Accompanying ligament injury ofthe knee, evident from anamnesis, physical examination, radiograph and MRl, defined as an ACL rupture in combination with a posterior cruciate ligament or collateral ligament injury, * Peroperative discovery of cartilage damage; larger than 2cm2 and more than 50% depth * Peroperative discovery of meniscus injury witch requires a meniscectomy of more than 20% or meniscus sutures * Osteoarthritis of Kellgren and Lawrence grade 2 or more, as evident from the radiograph * Severe malalignment of the leg * Tendency to form excessive scar tissue, such as arthrofibrosis * Muscular, neurological or vascular anomalies that influence healingtime or rehabilitation * Infection * Known hypersensitivity to any of the used materials * Long term relevant medication use such as prednisolone or cytostatics * Pregnancy at the time of inclusion or surgery * Known osteoporosis