比目鱼肌长头在跟腱病中的作用：一项生物力学研究。

The role of Plantaris Longus in Achilles tendinopathy: a biomechanical study.

机构信息

Avon Orthopaedic Center, Westbury-on-Trym, Bristol, BS10 5NB, United Kingdom.

出版信息

Foot Ankle Surg. 2011 Dec;17(4):252-5. doi: 10.1016/j.fas.2010.08.004. Epub 2010 Sep 15.

DOI:10.1016/j.fas.2010.08.004

PMID:22017896

Abstract

BACKGROUND

The Plantaris Longus Tendon (PLT) may be implicated in Achilles (AT) tendinopathy. Different mechanical characteristics may be the cause. This study is designed to measure these.

METHODS

Six PLT and six AT were harvested from frozen cadavers (aged 65-88). Samples were stretched to failure using a Minimat 2000™ (Rheometric Scientific Inc.). Force and elongation were recorded. Calculated tangent stiffness, failure stress and strain were obtained. Averaged mechanical properties were compared using paired, one-tailed t-tests.

RESULTS

Mean stiffness was higher (p<0.001) in the PLT, measuring 5.71 N/mm (4.68-6.64), compared with 1.73 N/mm (1.40-2.22) in AT. Failure stress was also higher (p<0.01) in PLT: 1.42 N/mm(2) (0.86-2.23) AT: 0.20 N/mm(2) (0.16-0.25). Failure strain was less (p<0.05) in PLT: 14.1% (11.5-16.8) than AT: 21.8% (14.9-37.9).

CONCLUSIONS

The PLT is stiffer, stronger than AT, demonstrating potential for relative movement under load. The stiffer PLT could tether AT and initiate an inflammatory response.

摘要

背景

跖肌腱（PLT）可能与跟腱（AT）病变有关。不同的力学特性可能是其原因。本研究旨在测量这些特性。

方法

从冷冻尸体（年龄 65-88 岁）中采集了 6 个 PLT 和 6 个 AT。使用 Minimat 2000™（流变科学公司）将样品拉伸至断裂。记录力和伸长率。计算出切线刚度、断裂应力和应变。使用配对、单侧 t 检验比较平均力学性能。

结果

PLT 的平均刚度较高（p<0.001），为 5.71 N/mm（4.68-6.64），而 AT 的平均刚度为 1.73 N/mm（1.40-2.22）。PLT 的断裂应力也较高（p<0.01）：1.42 N/mm（2）（0.86-2.23）；AT：0.20 N/mm（2）（0.16-0.25）。PLT 的断裂应变较低（p<0.05）：14.1%（11.5-16.8）；而 AT：21.8%（14.9-37.9）。