The mechanical strength of side-to-side tendon repair with mismatched tendon size and shape.

The mechanical strength of side-to-side tendon repair with mismatched tendon size and shape.
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DOI:
10.1177/1753193413517327
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发表时间:
2015-03
期刊:
The Journal of hand surgery, European volume
影响因子:
--
通讯作者:
Lieber RL
Lieber RL
中科院分区:
其他
文献类型:
--
作者:
Fridén J;Tirrell TF;Bhola S;Lieber RL

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由于供体和受体肌腱之间的大小或形状不匹配,建议在肌腱转移中避免某些组合。在本研究中,测量了两种肌腱-肌腱连接的极限载荷、刚度和杨氏模量,其中供体和受体肌腱故意不匹配-旋前圆肌(PT)-桡侧腕短伸肌(ECRB)和尺侧腕屈肌(FCU)-趾总伸肌(EDC)。FCU-EDC附件在比PT-至-ECRB附件更高的载荷下失效,但它们具有相似的模量和刚度值。肌腱连接的极限拉伸强度超过了任何受影响肌肉的最大预测收缩力,FCU-EDC和PT-ECRB结构的安全系数分别为4倍和2倍。这意味着大小和形状不匹配不应成为转移中肌腱附着的禁忌症。此外,这些安全因素强烈表明,术后不需要固定这些附件。
Certain combinations are advised against in tendon transfers due to size or shape mismatches between donor and recipient tendons. In this study, ultimate load, stiffness and Young’s modulus were measured in two tendon-to-tendon attachments with intentionally mismatched donor and recipient tendons - pronator teres (PT)-to-extensor carpi radialis brevis (ECRB) and flexor carpi ulnaris (FCU)-to-extensor digitorum communis (EDC). FCU-EDC attachments failed at higher loads than PT-to-ECRB attachments but they had similar modulus and stiffness values. Ultimate tensile strength of the tendon attachments exceeded the maximum predicted contraction force of any of the affected muscles, with safety factors of 4x and 2x for the FCU-to-EDC and PT-to-ECRB constructs, respectively. This implies that size and shape mismatch should not be a contraindication to tendon attachment in transfers. Further, these safety factors strongly suggest that no postoperative immobilization of these attachments is necessary.
DOI: 10.1016/0363-5023(90)90103-x
发表时间: 1990-03-01
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