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Optimum location of knot for tendon surgery in side-locking loop technique
Fumito Komatsu1, Ryuji Mori, Yuji Uchio
1Department of Orthopaedic Surgery, Shimane University School of Medicine, 89-1 Enya-cho, Izumo-shi, Shimane-ken 693-8501, Japan. labo@med.shimane-u.ac.jp
Clinical Biomechanics (Bristol, Avon)
|October 24, 2006
Summary
Burying the suture knot between the loops in bovine tendon repairs significantly improved biomechanical properties. This optimized knot placement enhanced tendon strength and reduced gap formation, offering a more robust surgical outcome.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Materials Science
Background:
- Suture failure near the knot is a common complication in tendon repair.
- Existing techniques aim for stronger repairs, but knot security remains a challenge.
Purpose of the Study:
- To investigate the impact of suture knot location on the biomechanical properties of tendon repairs.
- To determine if specific knot placement can reduce suture failure and improve repair strength.
Main Methods:
- Transected bovine medial gastrocnemius tendons were repaired using a side-locking loop technique with polyethylene and polyester multifilament sutures.
- Sutures were tied with seven simple square knots placed at three distinct locations: on the loop, between stumps, or buried between loops within a tendon slit.
- Repaired tendons underwent cyclical loading from 10N to 100N for 10,000 cycles.
Main Results:
- Knot placement between the loops, particularly when buried, resulted in the greatest reduction in gap formation and the highest ultimate strength.
- The buried knot occupied a small percentage (1.6-2.3%) of the tendon's cross-sectional area.
- Polyethylene and polyester multifilament sutures demonstrated excellent durability against frictional abrasion.
Conclusions:
- Locating the suture knot between the loops and burying it within the tendon provides optimal biomechanical results for tendon repair.
- This technique enhances repair strength and minimizes gap formation, addressing a critical failure point in tendon surgery.
