Division of Hand, Plastic and Aesthetic Surgery, University Hospital, LMU Munich, Munich, Germany.
Women's Clinic Dr. Geisenhofer, Munich, Germany.
PLoS One. 2023 Aug 4;18(8):e0289650. doi: 10.1371/journal.pone.0289650. eCollection 2023.
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).
在肌腱转移手术中，确保肌腱缝合的充分稳定性是至关重要的。除了选择合适的技术外，还必须确保供体和受体肌腱有足够的重叠。本研究旨在探讨一种最近发表的肌腱缝合技术（称为编织-弗里登（WF）肌腱缝合）的肌腱重叠的拉伸强度，与已建立的普尔沃特夫特技术相比，该技术显示出更高的拉伸强度和更低的体积。为此，进行了 1.5cm、2cm 和 3cm 肌腱重叠的 WF 肌腱缝合，并通过拉伸试验对不同的生物力学特性进行了测试。收集了极限载荷和刚度等参数。天然肌腱作为对照。推导出了一个公式来量化肌腱重叠与极限载荷之间的关系。我们观察到，2cm 的肌腱重叠已经提供了足够的拉伸强度（平均极限载荷为 217N）。此外，超过 3cm 的重叠长度只会增加很小的拉伸强度，因为计算得出的 4cm 重叠的极限载荷（397N）接近 435N（天然肌腱）的最大极限载荷的平台。
