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Meniscus Repair – Surgery, Procedure & Recovery

Meniscus repair is a surgical procedure to fix a torn meniscus in the knee joint, aiming to preserve the natural cartilage tissue and restore full knee function.

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Things worth knowing about "Meniscus repair"

Meniscus repair is a surgical procedure to fix a torn meniscus in the knee joint, aiming to preserve the natural cartilage tissue and restore full knee function.

What Is Meniscus Repair?

Meniscus repair (also called meniscal repair or meniscal suturing) is a surgical procedure performed on the knee joint in which a torn meniscus – a crescent-shaped piece of cartilage – is stitched back together using surgical sutures. Unlike a partial meniscectomy, which removes the damaged tissue, meniscus repair aims to preserve the natural structure and protect the long-term health of the knee joint.

Anatomy and Function of the Meniscus

The knee contains two menisci: the medial meniscus (inner side) and the lateral meniscus (outer side). These are made of fibrocartilage and serve several important functions:

Even distribution of pressure across the knee joint
Stabilization of the knee
Shock absorption during movement
Promotion of joint lubrication

A meniscal tear can severely disrupt these functions and, over time, may lead to knee osteoarthritis if left untreated.

Causes of a Meniscal Tear

A meniscal tear commonly results from:

Sports injuries involving sudden twisting or shearing forces on the knee
Direct impact to the knee joint
Degenerative changes in older individuals (wear-related tears)
Combined injuries, such as those occurring alongside an anterior cruciate ligament (ACL) tear

When Is Meniscus Repair Indicated?

Not every meniscal tear is suitable for repair. Meniscus repair is most appropriate when:

The tear is located in the well-vascularized outer zone of the meniscus (the so-called red zone), where healing potential is highest
The tear is longer than 1 cm and allows for stable suturing
The patient is young and physically active
There is no severe pre-existing arthritis of the knee

In the inner, poorly vascularized zone (white zone), tissue healing after suturing is often unreliable, so partial removal is more frequently performed in those cases.

Surgical Technique

Meniscus repair is most commonly performed arthroscopically (minimally invasive through small incisions). The surgeon inserts a camera and instruments into the knee joint and sutures the torn meniscus under direct visualization. Several suturing techniques are used:

Inside-out technique: Sutures are passed from inside the joint to the outside and tied at the joint capsule
Outside-in technique: Needles are introduced from outside and the sutures are tied on the inside
All-inside technique: Fully arthroscopic, using specialized implanted suture anchors without additional skin incisions

The choice of technique depends on the location and pattern of the tear as well as the surgeon's experience.

Postoperative Care and Rehabilitation

Consistent postoperative care is essential for successful healing after meniscus repair:

Partial weight-bearing on the operated leg for several weeks (typically 6 weeks)
Physical therapy to restore strength, range of motion, and joint stability
Avoidance of deep knee bending and rotational movements during the healing phase
Full return to sports is generally expected after 4–6 months

Outcomes and Risks

Meniscus repair has a success rate of approximately 70–90% when the correct indications are met. Compared to partial meniscectomy, repair provides better long-term protection against knee osteoarthritis. Potential risks of the procedure include:

Failure to heal (re-tear), potentially requiring revision surgery
Infection
Deep vein thrombosis
Nerve or vascular injury (rare)

References

Krause M et al. – Meniscus repair: indications, techniques and outcomes. Der Orthopäde, Springer Medizin (2018).
German Society for Orthopaedics and Trauma Surgery (DGOU) – Clinical Guideline: Meniscal Disorders – Diagnosis and Treatment (2021).
Mordecai SC et al. – Treatment of meniscal tears: An evidence-based approach. World Journal of Orthopedics, 5(3):233–241 (2014).

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