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H-Loop Knotless Double-Row Repair Versus Krackow Repair for Achilles Tendon Rupture: A Biomechanical Study in a
Jingyi Hou1, Yuxiang Li1, Zhenze Zheng1
1Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangdong, China.
Orthopaedic Journal of Sports Medicine
|October 9, 2024
Summary
The H-loop knotless double-row (HLDR) suture repair shows superior biomechanical properties for Achilles tendon rupture compared to the Krackow technique. This study in cadavers indicates HLDR offers better resistance to elongation, gap formation, and failure load.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Sports Medicine
Background:
- Achilles tendon rupture surgery is effective, but optimal techniques are debated.
- Surgical repair aims to restore tendon integrity and function.
Purpose of the Study:
- To compare biomechanical properties of H-loop knotless double-row (HLDR) suture repair versus Krackow suture repair for Achilles tendon rupture.
- Evaluate tendon elongation, gap formation, and failure load in a cadaveric model.
Main Methods:
- Ten matched Achilles tendon specimens were used in a controlled laboratory study.
- Specimens underwent cyclic loading, and biomechanical properties were measured.
- Paired t-tests were used to compare HLDR and Krackow repair groups.
Main Results:
- HLDR repair demonstrated significantly less tendon elongation across all load cycles (P < .01).
- HLDR showed a smaller gap distance (0.30 ± 0.02 mm vs 8.10 ± 0.46 mm) and required greater force for a 2-mm gap (419.68 ± 39.48 N vs 22.29 ± 3.40 N).
- The ultimate failure load was significantly higher for HLDR (519.91 ± 57.29 N vs 220.30 ± 19.27 N) (P < .01).
Conclusions:
- The HLDR technique exhibited superior biomechanical performance over the Krackow technique in the cadaveric model.
- HLDR demonstrated advantages in resisting elongation, gap formation, and ultimate failure load.
- HLDR represents a potentially viable surgical option for Achilles tendon rupture repair.
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