Biomechanical study of posterior wall acetabular fracture fixation using acetabular tridimensional memory alloy-fixation system
Biomechanical study of posterior wall acetabular fracture fixation using acetabular tridimensional memory alloy-fixation system
复制标题
髋臼三维记忆合金固定系统固定髋臼后壁骨折的生物力学研究
DOI：
10.1016/j.clinbiomech.2010.01.008
复制
发表时间：
2010-05-01
影响因子：
1.8
通讯作者：
Wang Pan-feng
中科院分区：
文献类型：
--
作者：
Liu Xin-wei;Xu Shuo-gui;Wang Pan-feng
背景：根据生物记忆材料和镍钛诺合金的特定力学特性，根据测量的髋臼与骨盆股骨头的接触面积和压力分布，研制了以镍钛形状记忆合金为材料的髋臼三维记忆合金固定系统（ATMFS）。方法：采用6具经福尔马林保存的尸体骨盆进行研究。使用压敏膜测量髋臼前、上、后区域内的接触面积和压力。骨盆在以下四种情况下加载：(1)完整；(2)术后发生后壁骨折缺损；(3)采用重建钢板进行复位和标准内固定；(4)采用名为ATMFS的新型形状记忆合金装置进行复位和内固定。髋臼后壁沿40-90度弧度骨折。结果：与完整情况（762 N,P = 0.007）相比，后壁缺损的形成导致上髋臼负荷增加（1422 N）。复位和内固定后，分配到上髋臼（1486 N）的负荷与缺损情况无统计学差异。ATMFS内固定后，骶髂突上区（936 N）的载荷小于重建钢板内固定，与完整状态无显著差异（P = 0.4）。解释：这些数据表明，使用ATMFS作为骨折内固定装置导致关节载荷参数部分恢复到完整状态。ATMFS固定可带来临床益处。(C) 2010 Elsevier Ltd.版权所有。
Background: We developed the acetabular tridimensional memory alloy-fixation system (ATMFS), which is made of NiTi shape memory alloy, according to the specific mechanical properties of biological memory material, nitinol alloy and measured distribution of contact area and pressure between the acetabulum and the femoral head of cadaveric pelvis.Methods: Six formalin-preserved cadaveric pelvis were used for this investigation. Pressure-sensitive film was used to measure contact area and pressure within the anterior, superior, and posterior regions of the acetabulum. The pelvis were loaded under the following four conditions: (1) intact; (2) following a creation posterior wall fracture defect; (3) following reduction and standard internal fixation with reconstruction plate: (4) following reduction and internal fixation with a new shape memory alloy device named ATMFS. A posterior wall fracture was created along an arc of 40-90 degrees about the acetabular rim.Findings: Creation of a posterior wall defect resulted in increased load in the superior acetabulum (1422 N) as compared to the intact condition (762 N,P = 0.007). Following reduction and internal fixation, the load distributed to the superior acetabulum (1486 N) was not statistically different from the defect condition. Following the fixation with ATMFS, the load seen at the superior region of the actabulum (936 N) was less than fixation with reconstruction plate and was not different from intact state (P = 0.4).Interpretation: These data indicate that the use of ATMFS as a fracture internal fixation device resulted a partial restoration of joint loading parameters toward the intact state. ATMFS fixation may result in a clinical benefit. (C) 2010 Elsevier Ltd. All rights reserved.