Biomechanical properties of isolated fascicles of the Iliopsoas and Achilles tendons in African American and Caucasian men
Biomechanical properties of isolated fascicles of the Iliopsoas and Achilles tendons in African American and Caucasian men
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DOI：
10.1016/j.aanat.2012.03.007
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发表时间：
2012-01-01
影响因子：
2.2
通讯作者：
Magnusson, S. P.
中科院分区：
文献类型：
--
作者：
Hanson, P.;Aagaard, P.;Magnusson, S. P.
目的：调查的髂腰肌和跟腱的生物力学性能在年轻的非洲裔美国人（AA）和高加索人（CC）的男子，并试图澄清是否AA和CC之间的跟腱断裂的差异可以解释的差异在materials properties.Methods：组织从12个年轻男性（AA，n = 6; CC，n = 6）从常规法医尸检。从年龄、身高和体重匹配的尸体中获得髂腰肌和跟腱样本。结果：髂腰肌肌腱束的峰值失效应力在AA（22.4 +/- 7.2 MPa）中显著高于CC（6.8 +/- 2.1 MPa）（p < 0.05），而峰值应变没有差异（AA：19.7 +/-5.2%，CC：18.3 +/- 3.5%）。同样，AA（165.3 +/-67.3MPa）中的杨氏模量大于CC（63.6 +/-23.6MPa）（p < 0.05）。相比之下，AA（21.9 +/- 9.9 MPa）和CC（28.1 +/- 9.8 MPa）的跟腱束峰值失效应力相似（p > 0.1），AA（16.3 +/- 3.5%）和CC（13.8 +/- 4.4%）的峰值应变没有差异（p > 0.1）。CC组的杨氏模量（316.8 +/- 110 MPa）略高于AA组（222.8 +/- 84.6 MPa），但无显著性差异（p > 0.1）。结论：这些发现表明，年轻AA组的髂腰肌腱束比CC组男性更强，这反映了肌肉质量和力量产生能力的差异。这在跟腱束中无法证实。(c)2012年由Elsevier GmbH出版。
Objectives: To investigate biomechanical properties of the Iliopsoas and Achilles tendons in young African American (AA) and Caucasian (CC) men, and attempt to clarify whether the difference in Achilles tendon ruptures between AA and CC can be explained by differences in material properties.Methods: Tissue from 12 young males (AA, n = 6; CC, n = 6) was obtained from routine forensic autopsies. Iliopsoas and Achilles tendon samples were obtained from cadavers that were age, height and weight matched. Tendon collagen fascicles were tested micromechanically in a Deben mechanical testing rig.Results: Peak failure stress in Iliopsoas tendon fascicles was considerably higher (p < 0.05) in AA (22.4 +/- 7.2 MPa) than CC (6.8 +/- 2.1 MPa) whereas peak strain did not differ (AA: 19.7 +/- 5.2%, CC: 18.3 +/- 3.5%). Likewise, Young's modulus was greater (p < 0.05) in AA (165.3 +/- 67.3 MPa) than CC (63.6 +/- 23.6 MPa). In contrast, peak failure stress in Achilles tendon fascicles was similar (p > 0.1) in AA (21.9 +/- 9.9 MPa) and CC (28.1 +/- 9.8 MPa), and peak strain did not differ (p > 0.1) between AA (16.3 +/- 3.5%) and CC (13.8 +/- 4.4%). Young's modulus was slightly greater in CC (316.8 +/- 110 MPa) than AA (222.8 +/- 84.6 MPa), yet not significantly (p > 0.1).Conclusions: These findings indicate that Iliopsoas tendon fascicles are stronger in young AA compared to CC males, which is suggested to reflect differences in muscle mass and force generating capacity. This could not be confirmed in Achilles tendon fascicles. (c) 2012 Published by Elsevier GmbH.