Flexor tendon repair with a polytetrafluoroethylene (PTFE) suture material

Area of Science:

• Orthopedic Surgery
• Biomaterials Science
• Hand Surgery

Background:

• Early active motion after flexor tendon repair improves outcomes.
• Suture material and technique must withstand increased biomechanical demands for aggressive rehabilitation.

Purpose of the Study:

• To evaluate polytetrafluoroethylene (PTFE) suture for flexor tendon repair.
• To compare PTFE with polypropylene (PPL) in biomechanical testing.

Main Methods:

• Cadaveric flexor tendons were repaired using 2-strand Kirchmayr-Kessler technique with PPL or PTFE sutures.
• Suture properties, knotting, and mechanical strength of repairs were assessed.
• Repairs included core suture and epitendinous running suture.

Main Results:

• PTFE sutures demonstrated higher linear loading strength than PPL sutures.
• Core-only repairs with PTFE failed due to cheese wiring.
• Repairs with both core and epitendinous PTFE sutures showed significantly higher strength (p=0.006).

Conclusions:

• PTFE offers superior material strength for flexor tendon repair compared to PPL.
• Standard two-strand repair techniques are inadequate for high biomechanical demands.
• Further research into advanced repair techniques is necessary for effective flexor tendon healing.