Meniscal root suturing techniques: implications for root fixation

Area of Science:

• Orthopedic surgery
• Biomechanical analysis
• Sports medicine

Background:

• Meniscal root tears are increasingly recognized.
• Effective fixation is crucial for successful rehabilitation and preventing early failure.
• Suture fixation techniques are commonly employed for meniscal root repair.

Purpose of the Study:

• To compare the maximum failure load of native human meniscal roots.
• To evaluate the biomechanical strength of three common meniscal root fixation techniques: 2 simple stitches, modified Kessler stitch, and loop stitch.
• To determine if current fixation methods can restore the native strength of meniscal roots.

Main Methods:

• A controlled laboratory study design was utilized.
• The maximum failure load of 64 human native meniscal roots (anteromedial, posteromedial, anterolateral, posterolateral) was assessed.
• The failure load of 24 meniscal roots repaired with 2 simple stitches, modified Kessler stitch, or loop stitch was evaluated.

Main Results:

• The native anterolateral meniscal root exhibited the highest failure load, while the anteromedial root was significantly weaker.
• Among fixation techniques, the modified Kessler stitch demonstrated the greatest maximum failure load, followed by the loop stitch and then the 2 simple stitches.
• None of the evaluated fixation techniques successfully replicated the strength of the native meniscal roots.

Conclusions:

• The anterolateral meniscal root is biomechanically the strongest, and the anteromedial root is the weakest.
• The modified Kessler stitch provides superior primary fixation strength compared to loop and simple stitch techniques.
• Current meniscal root fixation methods do not restore native root strength, necessitating careful rehabilitation protocols.