Why do some meniscus repairs fail, and what happens if mine does?

Factors linked to the tear

• Tears in the inner, poorly supplied zone have less healing potential
• Complex, multi-plane or degenerative tears hold stitches less well
• Long tears and those left displaced for months often have damaged edges
• Very thin or poor-quality tissue

Surgeons sometimes repair borderline tears in young patients knowing the risk is higher, because the benefit of saving the meniscus is worth trying for.

Factors linked to the knee and the patient

An ACL-deficient knee shifts with every turn, which places repeated strain on a repair; this is why the ligament is usually reconstructed at the same time. Leg alignment that overloads one side of the knee, smoking, poorly controlled diabetes and high body weight can all slow healing.

Factors linked to recovery

The most avoidable cause is overloading the knee too early, such as deep squatting, kneeling back on the heels, or returning to football or padel before the meniscus has matured. A new twisting injury can also re-tear a well-healed repair, just as it can tear a normal meniscus.

If a repair fails

Signs include a return of joint-line pain, catching, locking or swelling. An MRI after repair can be hard to interpret, because healed tissue may still show signal, so examination matters. Options include a further repair if the tissue allows, or trimming the unstable part. Dr. Gelber at Aman Hospital in Doha reviews the original operation, the imaging and your symptoms before advising.