Medial Meniscal Repair
Assessment, non-operative care, and contemporary meniscal surgery
About the medial meniscus
The medial meniscus is a crescent-shaped structure on the inside of the knee made of fibrocartilage. It plays an important role in load distribution, joint stability, and smooth knee movement during walking, bending, twisting, and weight-bearing activities.
Because the medial meniscus is less mobile and more firmly attached than the lateral meniscus, it is more prone to injury.
How do medial meniscal injuries occur?
Medial meniscal tears commonly occur with:
Twisting of the knee while it is bent, particularly with the foot fixed
Sudden pivoting or change of direction during sport
Awkward landings or deep squatting
Degenerative changes that weaken the meniscus over time
The inner portion of the meniscus has a limited blood supply, which means many tears have a reduced capacity to heal without intervention.
Symptoms
Symptoms vary depending on the tear pattern and may include:
Sharp pain at the time of injury
Swelling developing over several hours
Pain on the inside of the knee with twisting, kneeling, or deep bending
Clicking or catching sensations
Locking of the knee if a fragment becomes trapped
Difficulty fully straightening or bending the knee
Diagnosis
Diagnosis is based on:
A detailed clinical assessment
MRI scanning to confirm the tear type, location, and any associated injuries (such as ligament damage or cartilage wear)
Treatment options
Non-operative management
Many meniscal tears, particularly degenerative or stable tears, respond well to non-operative treatment, which may include:
Activity modification
Physiotherapy to improve strength, movement control, and knee mechanics
Anti-inflammatory medication
Corticosteroid (cortisone) injection in selected cases
These treatments aim to reduce symptoms and improve function but do not structurally repair the tear.
Surgical treatment
Surgery may be considered when:
Symptoms persist despite appropriate non-operative care
The knee locks or catches
The tear pattern has healing potential
A concurrent ligament injury is present
Procedures are performed arthroscopically (keyhole surgery), usually as a day-case.
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There is a strong emphasis on preserving the medial meniscus wherever feasible.
The meniscus plays a critical role in protecting joint cartilage. Loss of meniscal tissue increases the risk of long-term degeneration and osteoarthritis. For this reason, repair is prioritised whenever the tear pattern and tissue quality allow.
Modern surgical techniques have significantly expanded the range of tears that can be repaired. These include:
Advanced suture-based fixation techniques
Improved arthroscopic access to complex tear patterns
Biological augmentation strategies, including blood clot augmentation, where healing factors are introduced directly into the repair site
These techniques help stimulate healing, even in areas with relatively limited blood supply, and improve the likelihood of successful meniscal preservation.
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When repair is not possible (for example, due to poor tissue quality or irreparable tear patterns), the unstable torn portion of the meniscus is carefully trimmed and smoothed, while preserving as much healthy tissue as possible.
The goal is to maintain load distribution, joint stability, and smooth knee mechanics.
Rehabilitation
Rehabilitation is essential following both non-operative and surgical management of meniscal injuries.
Rehabilitation typically focuses on:
Early restoration of knee movement
Strengthening the quadriceps, hamstrings, and hip stabilisers
Improving balance, stability, and movement control
Gradual progression to functional and sport-specific activities
Return to sport timelines
Return to sport depends on the type of treatment and individual recovery.
After partial meniscectomy (resection):
Return to sport may occur from around 4 weeks
Depends on pain, swelling, strength, and movement control
After meniscal repair:
Return to sport is usually 12 weeks or later
Allows time for biological healing and protection of the repair
Higher-demand sports may require longer based on functional testing
Key points to remember
The meniscus is vital for load distribution, knee stability, and cartilage protection
Medial meniscal tears are common, particularly with twisting injuries
MRI is important for accurate diagnosis
Many tears improve with non-operative treatment
Meniscal preservation is strongly prioritised where possible
Modern repair techniques, including biological augmentation, improve healing potential
Rehabilitation is crucial for long-term knee health
Frequently asked questions
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No. Many meniscal tears improve with physiotherapy, activity modification, and symptom-guided care.
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Some meniscal tears can heal, particularly those in the outer (better-vascularised) zone.
However:
Many medial meniscal tears occur in areas with limited blood supply
Degenerative tears are less likely to heal structurally
Modern surgical approaches aim to enhance the body’s natural healing response.
Where appropriate, repair is supported with biological augmentation techniques such as blood clot augmentation, which introduces healing factors into the tear site.For this reason, there is a strong focus on restoring and preserving the meniscus rather than removing it, wherever possible.
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Symptoms such as pain, swelling, catching, or locking may persist. Some tear patterns can intermittently irritate the joint or limit movement.
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Driving is usually possible once you can safely perform an emergency stop and are no longer taking strong pain medication.
After meniscal repair:
Right knee: 4–6 weeks
Left knee (automatic vehicle): 2–3 weeks
After partial meniscectomy:
Often within 1–2 weeks, depending on comfort and control
Always confirm timing with your surgeon and insurer before resuming driving.
When to seek assessment
If you experience ongoing knee pain, swelling, catching, locking, or instability, assessment can help clarify the diagnosis and guide appropriate treatment and rehabilitation.