Meniscal Transplantation (Meniscus Replacement): Who Qualifies, How It Works and Recovery
Updated: 6 days ago
Written and medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: October 2026 · How we review
Quick Answer: What is meniscal transplantation?
Meniscal transplantation is knee surgery that replaces a missing or badly torn meniscus with a meniscus from a deceased donor. It is usually done arthroscopically in active people under 40 to 50 without knee arthritis. It aims to ease pain, improve knee function and delay osteoarthritis, and crutches are typically needed for four to six weeks. [1]
What the research says
About three in four grafts still work 10 years later. A systematic review of 11 studies (658 patients, 688 transplants) found average graft survival of 73.5% at 10 years and 60.3% at 15 years. (Novaretti et al., Arthroscopy, 2019) [2]
Most active patients return to sport. Pooled data from 9 studies showed 77% of athletes and physically active patients went back to sport, and two-thirds reached their pre-injury level; 13% needed a graft-related reoperation and 1.2% went on to partial or total knee replacement. (Grassi et al., Sports Health, 2019) [3]
Pain and function gains are big enough to feel. A meta-analysis of 35 studies (1,658 patients) found that average improvements in pain and knee-function scores passed the threshold patients notice as a meaningful change. (Su et al., Am J Sports Med, 2022) [4]
Key takeaways
A meniscus transplant replaces a damaged or removed meniscus with donor cartilage that is tested for disease and size-matched to your knee. [1]
The best candidates are active adults under about 40 to 50 with no knee arthritis, a stable, well-aligned knee and a healthy weight. [1]
The surgery is minimally invasive (arthroscopic) and done under general anesthesia, often as a same-day procedure. [1]
Expect crutches and a brace for about four to six weeks, and a break from sports for six to 12 months. [1]
Complications are rare, but some people tear the new meniscus or need a second operation. [1]
What is the meniscus and why does losing it matter?
The meniscus is a C-shaped piece of rubbery cartilage that cushions the knee joint and protects the leg bones as they move. [1]
Each knee has two menisci:
Medial meniscus — on the inner side of the knee.
Lateral meniscus — on the outer side of the knee.
When a meniscus is so badly damaged that it cannot be repaired, surgeons sometimes remove it (a meniscectomy). Living without a meniscus raises the risk of osteoarthritis and long-term knee pain, because the other cartilage in the knee starts to wear away. [1][5]
Meniscus tears are common, especially in sports, and usually happen when the knee twists suddenly. Read more in our guide to a torn meniscus and the more severe bucket handle meniscus tear. [1]
What is meniscal transplantation?
Meniscal transplantation is surgery that replaces a damaged, torn or missing meniscus with a healthy one. [1]
Doctors also call it meniscal allograft transplantation (MAT). "Allograft" means the tissue comes from a human donor — in this case, a deceased donor (cadaver). Researchers are also studying human-made (prosthetic) menisci, but donor tissue is the standard option today. [1]
The procedure has three main goals:
Replace the missing or damaged cartilage.
Relieve knee pain and improve how the knee works.
Prevent or delay osteoarthritis developing early in life. [1]
What does a meniscus transplant treat?
A meniscus transplant treats a severely damaged meniscus or a knee that has already lost its meniscus through a previous meniscectomy. [1]
It is a preventive, joint-preserving surgery. It can stop or slow the cartilage wear that follows meniscus loss, but it does not help people whose knee pain already comes from arthritis of the knee. [1]
Who is a good candidate for a meniscus transplant?
A good candidate for a meniscus transplant is a physically active person under about 40 to 50, with a missing or severely torn meniscus, no knee arthritis, and an otherwise healthy, stable and well-aligned knee. [1]
Your surgeon weighs several factors:
Factor | What surgeons look for |
Age | Usually under 40 to 50; teenagers are often advised to wait until their bones stop growing |
Activity level | Physically active people tend to do better |
Body weight | Keeping a healthy weight improves success |
Meniscus damage | Part of the meniscus is missing, or there is a severe tear |
Rest of the knee | No damage to other parts of the knee |
Alignment and ligaments | Proper knee alignment and stable knee ligaments |
Arthritis | Little or no arthritis; worn-away cartilage lowers the chance of success |
Source: [1]
If you have significant arthritis, you may not qualify, because the transplant is less likely to work once the knee's cartilage has worn away too much. [1]
How do you prepare for meniscus transplant surgery?
Preparing for meniscus transplant surgery involves a medication review, imaging if needed, fasting instructions and careful matching of a donor meniscus to your knee. [1]
Matching the donor meniscus. After removal from the donor, the meniscus is frozen to preserve it. Before surgery, it is tested for disease and measured for size and shape, so the selected graft fits your knee properly. [1]
Your pre-surgery checklist:
Medications — Tell your care team everything you take. You may need to stop some medicines, such as blood thinners, before surgery.
Imaging — You may need an MRI or X-ray so your surgeon can see detailed pictures of the inside of your knee.
Fasting — You will be told when to stop eating and drinking the night before. [1]
The surgery takes place in a hospital or an outpatient surgery center. You receive general anesthesia, so you are asleep and feel no pain during the operation. [1]
What happens during a meniscus transplant?
During a meniscus transplant, the surgeon uses knee arthroscopy to remove what remains of the damaged meniscus and secure a donor meniscus in its place with stitches or screws. [1]
Step by step:
Camera in. A tiny camera is inserted through a small cut. It shows the inside of your knee on a screen. (Learn how knee arthroscopy works.)
Tools in. Small instruments go in through another small cut, guided by the camera images.
Old tissue out. Any part of the damaged meniscus still in the knee is removed.
New meniscus in. The donor meniscus is placed and attached to the shinbone and the knee joint capsule with sutures (stitches) or screws.
Closing. The cuts are closed with stitches, and the knee is wrapped in a bandage or dressing. [1]
What happens right after meniscus transplant surgery?
Right after meniscus transplant surgery, most people go home the same day or after a short hospital stay, using crutches and a knee brace to protect the new meniscus. [1]
Your care team will explain how to look after your incisions. Expect to:
Use crutches for about four to six weeks.
Wear a brace to keep the knee stable and stop it from moving too much.
Start a customized physical therapy (PT) program when you are ready, with exercises and stretches that strengthen the muscles around the knee and improve range of motion. [1]
How long is recovery after a meniscus transplant?
Recovery after a meniscus transplant usually takes about one to two months for day-to-day healing, while a full return to sports and strenuous activity can take six to 12 months. [1]
Time after surgery | What to expect |
Day of surgery | Home the same day or after a short hospital stay |
First ~2 weeks | Rest and stay off your feet as much as possible |
Weeks 4–6 | Crutches and a knee brace; physical therapy begins when your care team says you are ready |
Months 1–2 | Most of the main recovery is complete |
Months 6–12 | Gradual, approved return to sports and strenuous activity |
Source: [1]
Always ask your surgeon before returning to an activity you enjoy. Giving the new meniscus enough time to heal protects your result. [1]
What are the benefits of a meniscus transplant?
The main benefits of a meniscus transplant are less knee pain, a return to activity for younger active people, and protection against early osteoarthritis. [1]
Because it is minimally invasive, it also needs less recovery time than traditional open surgery. [1]
What are the risks of a meniscus transplant?
Complications after a meniscus transplant are rare, but they include bleeding, infection, nerve or blood vessel damage, knee stiffness and healing problems that may need another operation. [1]
Risk | What it means |
Bleeding | A risk with any surgery |
Infection | A risk with any surgery; watch your incisions |
Vessel, soft-tissue or nerve damage | Injury to structures around the knee during surgery |
Knee stiffness | Reduced movement after surgery |
Healing problems | Some people need a second surgery |
Tear of the new meniscus | May need another procedure, most often a debridement to remove torn or damaged cartilage |
Source: [1]
What affects the outcome of a meniscus transplant?
The outcome of a meniscus transplant depends mainly on how well the graft fits, how closely you follow physical therapy, and the overall health, alignment and condition of your knee. [1]
Key factors:
The size, shape and placement of the donor meniscus.
Your commitment to your PT program after surgery.
Your overall health, ligament alignment and the condition of the knee. [1]
When should you call your surgeon after a meniscus transplant?
You should call your surgeon after a meniscus transplant if you have bleeding, severe pain that pain medicine does not relieve, or signs of infection. [1]
Contact your care team promptly if you notice:
Bleeding from the surgical area.
Severe or ongoing pain that does not improve with pain relief medicine.
Signs of infection — fever, severe swelling, or pus draining from the incisions. [1]
For general advice on a puffy joint, see our guide to a swollen knee.
Conclusion
A meniscus transplant gives active people who have lost or badly damaged a meniscus a real chance to move without knee pain and to protect their knee from early osteoarthritis. It is not right for everyone: age, activity level, weight, knee alignment and especially existing arthritis all decide whether it is likely to work. Recovery asks for patience — weeks on crutches and up to a year before strenuous sport — but careful rehabilitation is what turns a successful operation into a lasting result. [1]
Talk to an orthopedic surgeon if you have had a meniscus removed or have been told your tear cannot be repaired, and ask whether a meniscus transplant fits your knee. Keep exploring our knee library — start with the knee joint: anatomy and common injuries and cartilage and joint health — and subscribe for clear, evidence-based health guides.
FAQ
What is meniscal transplantation?
Meniscal transplantation is surgery that replaces a missing or severely torn knee meniscus with a meniscus from a deceased donor. It aims to relieve pain, improve knee function and delay osteoarthritis. [1]
Is a meniscus transplant the same as meniscal allograft transplantation (MAT)?
Yes, a meniscus transplant and meniscal allograft transplantation (MAT) are the same procedure. "Allograft" means the replacement tissue comes from a human donor. [1]
Who is a good candidate for a meniscus transplant?
A good candidate for a meniscus transplant is an active person under about 40 to 50 with a missing or badly torn meniscus and no knee arthritis. The knee should otherwise be healthy, stable and well aligned, and a healthy weight improves success. [1]
Can teenagers have a meniscus transplant?
Teenagers can have a meniscus transplant, but surgeons usually recommend waiting until the bones have finished growing. [1]
How long does it take to recover from a meniscus transplant?
Recovery from a meniscus transplant usually takes about one to two months, with crutches for four to six weeks. Returning to sports and strenuous activity can take six to 12 months. [1]
Is meniscus transplant surgery painful?
Meniscus transplant surgery itself is not painful because it is done under general anesthesia. Afterward, pain that is severe or does not ease with pain medicine is a reason to call your surgeon. [1]
Can a meniscus transplant fix knee arthritis?
A meniscus transplant cannot fix knee arthritis that is already causing pain. It works best before arthritis develops, to prevent or delay it. [1]
What are the warning signs after a meniscus transplant?
Warning signs after a meniscus transplant include bleeding, severe pain that pain medicine does not relieve, fever, severe swelling and pus draining from the incisions. Contact your surgeon promptly if any appear. [1]
When can I return to sports after a meniscus transplant?
Most people need a break from sports for 6 to 12 months after a meniscus transplant. Your surgeon will tell you when and which sports are safe, and some advise avoiding high-impact sports long term.
Will my body reject a donor meniscus?
Rejection of a donor meniscus is rare, and you do not usually need anti-rejection medicine. The donor tissue is screened and sized to fit your knee before surgery.
Related reading
References
Cleveland Clinic. Meniscus Replacement: What Is It, Risks, Benefits & Outlook. Cleveland Clinic. Last updated June 10, 2021. https://my.clevelandclinic.org/health/treatments/17220-meniscal-transplantation
Novaretti JV, Patel NK, Lian J, et al. Long-Term Survival Analysis and Outcomes of Meniscal Allograft Transplantation With Minimum 10-Year Follow-Up: A Systematic Review. Arthroscopy. 2019;35(2):659-667. PMID 30712641. https://doi.org/10.1016/j.arthro.2018.08.031
Grassi A, Bailey JR, Filardo G, et al. Return to Sport Activity After Meniscal Allograft Transplantation: At What Level and at What Cost? A Systematic Review and Meta-analysis. Sports Health. 2019;11(2):123-133. PMID 30638438. https://doi.org/10.1177/1941738118819723
Su L, Garcia-Mansilla I, Kelley B, et al. Clinical Outcomes of Meniscal Allograft Transplantation With Respect to the Minimal Clinically Important Difference. Am J Sports Med. 2022;50(12):3440-3446. PMID 34495780. https://doi.org/10.1177/03635465211036116
Frank RM, Cole BJ. Meniscus transplantation. Curr Rev Musculoskelet Med. 2015;8(4):443-450. PMID 26431702. https://doi.org/10.1007/s12178-015-9309-4
Medical disclaimer
This article is for general educational purposes only and does not replace professional medical advice, diagnosis or treatment. Always ask your doctor or orthopedic surgeon about your own knee and treatment options. If you have severe pain, heavy bleeding or signs of infection after surgery, seek medical care promptly.
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