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The minimum required overlap length for tendon transfer A biomechanical study on human tendons

Author

Listed:
  • Nikolaus Wachtel
  • Marc A Englbrecht
  • Carina Micheler
  • Jan J Lang
  • Rainer Burgkart
  • Riccardo E Giunta
  • Christina J Wilhelm

Abstract

In tendon transfer surgeries sufficient stability of the tenorrhaphy is essential. In addition to the choice of a suitable technique, adequate overlap of donor and recipient tendons must be ensured. The aim of this study was to investigate the tensile strength with regard to tendon overlap of a recently published tenorrhaphy, termed Woven-Fridén (WF) tenorrhaphy, which displayed higher tensile strength and lower bulk when compared to the established Pulvertaft technique. For this purpose, WF tenorrhaphies with 1.5 cm, 2 cm, and 3 cm tendon overlap were performed and subsequently tested for different biomechanical properties by tensile testing. Among others, the parameters of ultimate load and stiffness were collected. Native tendons served as controls. A formula was derived to quantify the relation between tendon overlap and ultimate load. We observed that sufficient tensile strength (mean ultimate load of 217 N) is already given with a 2 cm tendon overlap. In addition, with more than 3 cm overlap length only little additional tensile strength is to be expected as the calculated ultimate load of 4 cm overlap (397 N) is approaching the plateau of the maximal ultimate load of 435 N (native tendons).

Suggested Citation

  • Nikolaus Wachtel & Marc A Englbrecht & Carina Micheler & Jan J Lang & Rainer Burgkart & Riccardo E Giunta & Christina J Wilhelm, 2023. "The minimum required overlap length for tendon transfer A biomechanical study on human tendons," PLOS ONE, Public Library of Science, vol. 18(8), pages 1-10, August.
    • Handle: RePEc:plo:pone00:0289650
    DOI: 10.1371/journal.pone.0289650
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