BioPoly® Partial Resurfacing Knee Implant IDE

The goal of this randomized controlled clinical trial is to demonstrate the safety and effectiveness of the BioPoly® Partial Resurfacing Knee Implant for the treatment of cartilage defects of the distal femur in adult patients with knee pain and symptoms who are candidates for surgical intervention of the knee compared to outcomes for the control group. The primary effectiveness endpoint is Month 24 composite clinical success (CCS) defined by: * no secondary surgical intervention (SSI) and * an improvement from baseline in the Knee injury and Osteoarthritis Outcome Score (KOOS) total score (scaled 0 to 100) of at least 10 points. Researchers will compare the CCS for the investigational device group to a control group receiving the standard of care, either microfracture or debridement). Subjects randomized to the investigational group will receive the BioPoly Knee device and those randomized to the control group will receive the current standard of care, either microfracture or debridement.

The BioPoly® Partial Resurfacing Knee Implant is a surgical intervention when conservative therapies have been ineffective for focal cartilage lesions in the femoral condyles and is an early intervention prior to partial or total joint replacement. It is indicated for focal lesions with healthy surrounding and opposing cartilage. Specifically, the BioPoly® device is intended for the replacement of symptomatic abnormal or severely abnormal (ICRS Grade 2, 3 or 4) chondral or osteochondral focal lesions located in the femoral condyles or trochlear facets in patients between 30 and 65 years of age. The RCT compares the primary endpoint, Composite Clinical Success criteria, for the investigational device, the BioPoly device, to that of the control group, which is the standard of care for these focal lesions either microfracture or debridement. For those patients who meet eligibility criteria, randomization is 1:1. For the control group, there is a treatment algorithm to determine if microfracture or debridement that is based upon age of the subject, Kellgren-Lawrence score, and lesion size.