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A Novel Tenorrhaphy Suture Technique with Tissue Engineered Collagen Graft to Repair Large Tendon Defects
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Mechanical comparison of two suture constructs for extra-capsular stifle stabilization.

Nic R Cabano1, Kevin L Troyer, Ross H Palmer

  • 1Department of Clinical Sciences, Veterinary Medical Center, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, USA.

Veterinary Surgery : VS
|February 15, 2011
PubMed
Summary

Nylon leader line (NLL) constructs demonstrated superior mechanical performance compared to Orthofiber® (OF) constructs in stifle stabilization. NLL exhibited greater stiffness and strength, making it a mechanically advantageous option for extracapsular stifle repair.

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Area of Science:

  • Veterinary Orthopedics
  • Biomaterials Science
  • Surgical Techniques

Background:

  • Extracapsular stifle stabilization is crucial for treating stifle joint injuries in animals.
  • Suture construct biomechanics significantly influence surgical outcomes and implant longevity.
  • Evaluating novel suture materials is essential for improving stabilization techniques.

Purpose of the Study:

  • To mechanically evaluate and compare two suture constructs for extracapsular stifle stabilization.
  • To assess the performance of nylon leader line (NLL) and Orthofiber® (OF) constructs under various mechanical loads.
  • To determine the optimal suture material for canine stifle joint stabilization.

Main Methods:

  • An in vitro study was conducted using crimped interlocking loop constructs (ILC) made of NLL and OF.
  • Mechanical testing included ramp-to-failure, stress-relaxation, and incremental cyclic loading protocols.
  • Loop tension, elongation, stiffness, yield load, and peak load were recorded for each construct.

Main Results:

  • NLL constructs exhibited significantly greater stiffness (234.6 ± 25.0 N/mm vs. 125.7 ± 4.0 N/mm) and higher peak load (873.7 ± 68.6 N vs. 653.6 ± 80.2 N) compared to OF.
  • OF constructs showed greater stress relaxation and more elongation at failure (5.2 ± 1.0 mm vs. 19.1 ± 1.4 mm).
  • NLL constructs experienced variable knot tightening/crimp slippage, while OF constructs showed crimp-suture slippage.

Conclusions:

  • Nylon leader line (NLL) constructs are mechanically superior to Orthofiber® (OF) constructs for extracapsular stifle stabilization.
  • NLL offers better stiffness and load-bearing capacity, crucial for effective joint stabilization.
  • Further investigation into NLL construct fixation methods may optimize its clinical application.