Biomechanical study of posterior wall acetabular fracture fixation using acetabular tridimensional memory alloy-fixation system

Clinical Biomechanics
Liu Xin-weiWang Pan-feng

Abstract

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. 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. Creation of a posterior wall defect resulted in increased load in the superior acetabulum (1422N) as compared to the intact condition (762N, P=0.007). Following reduction and internal fixation, the load distributed to the superior acetabulum (1486N) was not statistically different from the def...Continue Reading

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Citations

Apr 11, 2013·Archives of Orthopaedic and Trauma Surgery·Yun-tong ZhangShuo-gui Xu
Dec 19, 2013·Trauma Monthly·Reza Tavakoli DarestaniMohammad Mahdi Bagherian Lemraski
Oct 19, 2013·International Journal of Computer Assisted Radiology and Surgery·Qinghua LiuYahui Fu
Feb 21, 2021·Medical Engineering & Physics·Hannah FerranteZ Shaghayegh Bagheri

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