Biomechanical Study of Two Peripheral Suture Methods on Repaired Tendons

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Hand Surgery

Background:

• Flexor digitorum tendon injuries require effective management for optimal patient outcomes.
• Current surgical techniques lack a standardized gold standard for flexor tendon repair.
• Peripheral suture techniques are crucial for tendon repair strength.

Purpose of the Study:

• To compare the biomechanical strength of two peripheral suture techniques for flexor tendon repair.
• To evaluate the influence of varying stitch lengths (1-5mm) on tendon repair strength.
• To determine the optimal stitch length for continuous running peripheral suture (CRPS) and continuous locking peripheral suture (CLPS).

Main Methods:

• Biomechanical testing of repaired pig flexor digitorum profundus tendons.
• Comparison of continuous running peripheral suture (CRPS) and continuous locking peripheral suture (CLPS).
• Assessment of repair strength across stitch lengths ranging from 1mm to 5mm.

Main Results:

• For CRPS, a 1mm stitch length yielded the highest maximum load and breaking power, significantly outperforming longer stitch lengths.
• For CLPS, the 1mm stitch length group showed consistently superior strength, double that of the 2mm group, with statistically significant differences.
• Shorter stitch lengths (1-2mm) demonstrated significantly greater repair strength than longer lengths (3-5mm) in both techniques.

Conclusions:

• A 1mm stitch length is highly recommended for simple peripheral suture techniques in flexor tendon repair.
• Optimizing stitch length is critical for enhancing the biomechanical integrity of repaired flexor tendons.
• This study provides evidence-based recommendations for improving flexor tendon repair outcomes.