Meniscus Transplant Study Group

Meniscus allograft transplantation may benefit patients who have lost meniscus tissue due to injury, previous surgery, or degenerative changes and are experiencing knee pain, swelling, or instability. Ideal candidates include patients with pain following meniscectomy (meniscus removal), individuals with isolated meniscus deficiency and relatively preserved articular cartilage, active individuals seeking to delay or avoid total knee replacement, and patients willing to commit to a structured rehabilitation program. Recent research has shown that meniscus transplantation can be successful even in patients over 50 years old with moderate arthritis when combined with other biologic knee restoration procedures.

Recovery from meniscus allograft transplantation is a gradual process that requires patience and commitment to rehabilitation. During weeks 0-6, patients use protected weight-bearing with crutches or brace, focusing on reducing swelling and regaining range of motion. From 6-12 weeks, progressive weight-bearing and strengthening exercises begin with low-impact activities. At 3-6 months, continued strengthening and introduction of higher-impact activities as tolerated. By 6-12 months, return to sports and full activities, with most patients achieving peak improvement by 12-18 months. Recovery timelines vary based on individual factors, concurrent procedures, and adherence to the rehabilitation protocol.

Published research from Stone Research Foundation and other institutions has demonstrated encouraging long-term outcomes for meniscus allograft transplantation: 89.4% allograft survival rate at 2-7 years follow-up, even in patients with moderate to severe unicompartmental arthritis. Results show significant pain reduction and functional improvement in the majority of patients, successful outcomes in patients over 50 years old when combined with biologic knee restoration procedures, and long-term survival of concurrent meniscus transplantation and articular cartilage repair procedures. Success depends on multiple factors including patient selection, surgical technique, rehabilitation compliance, activity modification, and concurrent procedures.

As with any surgical procedure, there is a small risk of infection following meniscus allograft transplantation. However, the risk is relatively low with modern surgical techniques and tissue processing protocols. Infection rates for arthroscopic meniscus transplantation are typically less than 1-2%. Donor tissue undergoes rigorous screening and sterilization protocols to minimize disease transmission risk. Prophylactic antibiotics are administered before and after surgery, and sterile surgical technique and proper wound care reduce infection risk. Warning signs of infection include increasing pain, fever, excessive swelling, redness, warmth, or drainage from incision sites. Contact your surgeon immediately if you experience these symptoms.