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

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 rece...

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Bibliographic Details
Published in:PloS one 2023-08, Vol.18 (8), p.e0289650-e0289650
Main Authors: Wachtel, Nikolaus, Englbrecht, Marc A, Micheler, Carina, Lang, Jan J, Burgkart, Rainer, Giunta, Riccardo E, Wilhelm, Christina J
Format: Article
Language:English
Subjects:
Biology and Life Sciences
Biomechanics
Computer and Information Sciences
Deformation
Engineering and Technology
Evaluation
Mechanical properties
Medicine and Health Sciences
Physical Sciences
Practice guidelines (Medicine)
Research and Analysis Methods
Software
Standard deviation
Statistical analysis
Surgery
Tendons
Tensile strength
Tensile tests
Ultimate loads
Variance analysis
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Summary: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).
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0289650