Improving Strength and Quality of Epitendinous Repairs

Area of Science:

• Orthopedics
• Biomedical Engineering
• Surgical Techniques

Background:

• Epitendinous sutures are crucial for tendon repair strength and support.
• Current techniques may be enhanced by incorporating additional suture threads.
• The aim is to improve repair strength without compromising tendon gliding.

Purpose of the Study:

• To evaluate the biomechanical strength of different epitendinous suture techniques.
• To assess the gliding resistance associated with these repair methods.
• To compare single vs. double thread running and locking suture techniques.

Main Methods:

• Caprine tendons were transected and repaired using 6-0 Prolene in four groups: single running (SR), single locking (SL), double running (DR), and double locking (DL).
• Tensile strength was measured using an Instron 5542 to determine energy at break.
• Gliding resistance was assessed using human A2 pulleys, measuring pre- and post-repair resistance ratios.

Main Results:

• The double locking (DL) group exhibited significantly higher energy at break (14,740.66 gf/mm) compared to SR, SL, and DR groups (P < .05).
• No significant difference in strength was found between SR, SL, and DR groups.
• The DL technique showed significantly higher gliding resistance (0.049 N/mm) compared to the SR technique (0.018 N/mm) (P < .05).

Conclusions:

• Single thread running and locking epitendinous repairs offer comparable strength.
• A double thread locking technique provides superior biomechanical strength for tendon repair.
• The double locking technique increases gliding resistance, a potential disadvantage in pulley systems.