Biomechanical Study Comparing Pulvertaft, Double Side-to-Side, and Locking Side-to-Side Tendon Suture Techniques

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Musculoskeletal Research

Background:

• Tendon transfers are crucial surgical procedures for restoring function.
• The Pulvertaft weave is a common technique for tendon reconstruction.
• There is a need for stronger and less bulky alternatives in tendon repair.

Purpose of the Study:

• To evaluate the biomechanical properties of a novel single-sided locking side-to-side (STS) suture technique.
• To compare the single-sided locking STS technique against the Pulvertaft weave and a double-sided nonlocking STS technique.
• To determine the suitability of these techniques for tendon transfers.

Main Methods:

• Utilized 24 human cadaveric extensor digitorum communis and 24 flexor digitorum superficialis tendons.
• Randomly assigned tendons into three groups: Pulvertaft, double-sided nonlocking STS, and single-sided locking STS.
• Measured load to failure and increase in cross-sectional area (bulkiness) using tensile testing.

Main Results:

• Single-sided locking STS reconstructions demonstrated higher load to failure than Pulvertaft in both extensor and flexor tendons.
• No significant difference in load to failure was observed between single-sided locking STS and double-sided nonlocking STS in extensor tendons.
• Pulvertaft reconstructions showed greater bulkiness compared to both single-sided locking and double-sided nonlocking STS techniques.

Conclusions:

• Single-sided locking and double-sided nonlocking STS reconstructions are viable, stronger, and less bulky alternatives to the Pulvertaft technique.
• The single-sided locking STS reconstruction is particularly well-suited for extensor tendon transfers due to comparable strength and reduced bulk.
• These findings support the clinical relevance of STS techniques for improved tendon transfer outcomes.