Failure properties and strain distribution analysis of meniscal attachments
Failure properties and strain distribution analysis of meniscal attachments
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DOI：
10.1016/j.jbiomech.2007.01.015
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发表时间：
2007-01-01
影响因子：
2.4
通讯作者：
Donahue, Tammy L. Haut
中科院分区：
文献类型：
--
作者：
Villegas, Diego F.;Maes, Jason A.;Donahue, Tammy L. Haut
由于退化和创伤性撕裂，阴茎经常受伤。有人认为，胫骨置换术的成功取决于几个因素，其中之一是置换物与胫骨平台的牢固固定和牢固连接。因此，当前研究的目的是（1）确定喇叭接头的失效特性，以及（2）确定其表面的应变分布。八个牛膝关节被用来研究关节附件的力学响应。在2%/s的单轴拉伸条件下，对每只动物一个膝关节的三个关节附件进行测试，以确定载荷变形响应。在试验过程中，对试样进行标记，并用视频引伸计测定局部应变分布。内侧前附着体的线性模量（154 +/- 134 MPa）显著低于内侧后附着体（248 +/- 179 MPa，p = 0.0111）和外侧前附着体（281 +/- 214 MPa，p = 0.0007）。同样，内侧前附着点的极限应变（13.5 +/- 8.8%）显著低于内侧后附着点（23 +/-13%，p < 0.0001）和外侧前附着点（20.3 +/-11.1%，p = 0.0033）。两种附着体的结构性能和极限应力无显著性差异（p > 0.05）。未观察到附件表面的极限应变或模量存在显著差异。根据所获得的数据，对于每个不同的附件，牙槽骨更换将需要不同的模量。然而，附件似乎是同质的。(c)2007爱思唯尔有限公司保留所有权利。
The menisci are frequently injured due to both degeneration and traumatic tearing. It has been suggested that the success of a meniscal replacement is dependent on several factors, one of which is the secure fixation and firm attachment of the replacement to the tibial plateau. Therefore, the objectives of the current study were to (1) determine the failure properties of the meniscal horn attachments, and (2) determine the strain distribution over their surfaces. Eight bovine knee joints were used to study the mechanical response of the meniscal attachments. Three meniscal attachments from one knee of each animal were tested in uniaxial tension at 2%/s to determine the load deformation response. During the tests, the samples were marked and local strain distributions were determined with a video extensometer. The linear modulus of the medial anterior attachment (154 +/- 134 MPa) was significantly less than both the medial posterior (248 +/- 179 MPa, p = 0.0111) and the lateral anterior attachment (281 +/- 214 MPa, p = 0.0007). Likewise, the ultimate strain for the medial anterior attachments (13.5 +/- 8.8%) was significantly less than the medial posterior (23 +/- 13%, p < 0.0001) and the lateral anterior attachment (20.3 +/- 11.1%, p = 0.0033). There were no significant differences in the structural properties or ultimate stress between the meniscal attachments (p > 0.05). No significant differences in ultimate strain or moduli across the surface of the attachments were noted. Based on the data obtained, a meniscal replacement would need different moduli for each of the different attachments. However, the attachments appear to be homogeneous. (c) 2007 Elsevier Ltd. All rights reserved.