Management of Full-Thickness Meniscal Tear
For a full-thickness meniscal tear, surgical intervention should prioritize meniscal preservation through repair whenever feasible, as this mitigates the risk of osteoarthritis and provides superior long-term functional outcomes compared to meniscectomy 1.
Treatment Algorithm
Initial Assessment and Timing
The management pathway depends critically on tear characteristics and mechanical symptoms:
- Displaced or displacing tears restricting knee range of motion: Proceed to early surgical intervention 1
- Non-displaced tears with tolerable symptoms: Trial of conservative management, but if symptoms persist, surgery should be performed within 6 months of injury for optimal outcomes 1
Surgical Decision-Making: Repair vs. Resection
The fundamental principle is tissue preservation 1. The 2025 AAOS guidelines emphasize that when surgery is indicated, the goal must be to preserve as much functional meniscal tissue as possible, as meniscal deficiency increases the odds of developing radiographic osteoarthritis by 3.0 to 7.9-fold 1.
Meniscal repair should be considered over meniscectomy for tears with healing potential 1. This includes:
- Tears in vascular zones (red-red or red-white zones)
- Vertical longitudinal tears
- Bucket-handle tears
- Radial tears in vascular regions
- Tears in younger, active patients
Repair Technique Selection
The 2025 AAOS consensus provides technical guidance 1:
- Inside-out technique: Favored to reduce risk of repair failure (provides strongest, most precise fixation)
- All-inside technique: May be chosen to reduce risk of other complications (avoids accessory incision and neurovascular exposure)
- Outside-in technique: Appropriate for anterior horn tears
For complete radial tears: These render the meniscus functionally incompetent (ameniscal state), making repair essential 2. Consider inside-out repair with tibial knotless suture anchor reinforcement for robust fixation.
Biological Enhancement
Platelet-rich plasma or bone marrow stimulation may be considered to optimize healing of meniscal repairs 1, though this carries limited evidence (Grade D recommendation).
When Concomitant ACL Injury Exists
Meniscal preservation should be prioritized in ACL-meniscal tear combinations 1. The ACL reconstruction itself enhances meniscal healing through improved stability and biological factors 3, 4.
Critical Pitfalls to Avoid
Delayed surgery beyond 6 months in symptomatic patients who fail conservative treatment—outcomes deteriorate with prolonged delay 1
Excessive tissue resection: Even when meniscectomy is necessary, remove only unstable/injured tissue. Meniscal deficiency directly accelerates osteoarthritis 1
Dismissing repair in "unfavorable" scenarios: The 2019 ESSKA consensus clarifies that many tears previously considered irreparable (older tears, obese patients, long tears) should actually be repaired 5
Assuming all tears need surgery: Non-displaced, stable tears without mechanical symptoms may respond to conservative management initially
Expected Outcomes
- Return to play: 65-100% at 4-7 months post-surgery 1
- Time off work: ~55 days for repair, ~37 days for meniscectomy 1
- Repair failure risk: Exists but is acceptable given superior long-term joint health compared to resection 5, 6
Rehabilitation Considerations
After meniscectomy, use criterion-based progression (milestone-driven). After repair, use combined time-based and criterion-based progression to protect healing tissue 7.
The evidence strongly supports a paradigm shift toward meniscal preservation, as the long-term consequences of meniscal deficiency (accelerated osteoarthritis, inferior function) outweigh the risks of repair failure 5, 6.