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Biomechanical evaluation of three different configurations of external fixators for treating distal third tibia fracture: Finite element analysis in axial, bending and torsion load
Computers in Biology and Medicine ( IF 7.0 ) Pub Date : 2020-10-17 , DOI: 10.1016/j.compbiomed.2020.104062
Abdul Hadi Abdul Wahab 1 , Ng Bing Wui 2 , Mohammed Rafiq Abdul Kadir 3 , Muhammad Hanif Ramlee 1
Affiliation  

External fixators have been widely used in treating open fractures and have produced excellent outcomes, as they could successfully heal bones. The stability of external fixators lies greatly in their construction. Factors that associated with the stability of the external fixators includes stress, displacement, and relative micromotion. Three-dimensional (3D) models of bone and external fixators were constructed by using 3D modelling software, namely Materialise and SolidWorks, respectively. Three different configurations of external fixators namely Model 1, Model 2, and Model 3 were analysed. Three load cases were simulated to assess the abovementioned factors at the bone, specifically at the fracture site and at the external fixator. Findings showed that the double-cross configuration (Model 3) was the most promising in axial, bending, and torsion load cases as compared to the other two configurations. The no-cross configuration (Model 1) had the highest risk of complication due to high stress, relative micromotion, and displacement in the bending and torsion load cases. On the other hand, the single-cross configuration (Model 2) had the highest risk of complication when applied with axial load. In conclusion, the double-cross locking construct (Model 3) showed the biggest potential to be a new option for medical surgeons in treating patients associated with bone fracture. This new double-cross locking construct showed superior biomechanical stability as compared to single-cross and no-cross configurations in the axial, bending, and torsion load cases.



中文翻译:

三种不同配置的外固定器治疗第三胫骨远端骨折的生物力学评估:轴向,弯曲和扭转载荷的有限元分析

外固定器已被广泛用于治疗开放性骨折,并且可以成功治愈骨骼,因此产生了极好的效果。外固定器的稳定性在很大程度上取决于其结构。与外固定器的稳定性相关的因素包括应力,位移和相对微动。使用3D建模软件(分别为Materialize和SolidWorks)构建了骨骼和外部固定器的三维(3D)模型。分析了外部固定器的三种不同配置,即模型1,模型2和模型3。模拟了三个载荷情况,以评估上述因素在骨骼上的影响,特别是在骨折部位和外固定架处。研究结果表明,双十字形(模型3)在轴向,弯曲,与其他两种配置相比,扭力工况。由于弯曲,扭转载荷情况下的高应力,相对微运动和位移,无交叉配置(模型1)具有最高的并发症风险。另一方面,单十字型(模型2)在承受轴向载荷时具有最高的并发症风险。总之,双交叉锁定结构(模型3)显示出最大的潜力,可以作为医学外科医生治疗骨折相关患者的新选择。与轴向,弯曲和扭转载荷情况下的单交叉和无交叉配置相比,这种新型的双交叉锁定结构具有卓越的生物力学稳定性。由于弯曲,扭转载荷情况下的高应力,相对微运动和位移,无交叉配置(模型1)具有最高的并发症风险。另一方面,单十字型(模型2)在承受轴向载荷时具有最高的并发症风险。总之,双交叉锁定结构(模型3)显示出最大的潜力,可以作为医学外科医生治疗骨折相关患者的新选择。与轴向,弯曲和扭转载荷情况下的单交叉和无交叉配置相比,这种新型的双交叉锁定结构具有卓越的生物力学稳定性。由于弯曲,扭转载荷情况下的高应力,相对微运动和位移,无交叉配置(模型1)具有最高的并发症风险。另一方面,单十字型(模型2)在承受轴向载荷时具有最高的并发症风险。总之,双交叉锁定结构(模型3)显示出最大的潜力,可以作为医学外科医生治疗骨折相关患者的新选择。与轴向,弯曲和扭转载荷情况下的单交叉和无交叉配置相比,这种新型的双交叉锁定结构具有卓越的生物力学稳定性。单轴配置(模型2)在承受轴向载荷时发生并发症的风险最高。总之,双交叉锁定结构(模型3)显示出最大的潜力,可以作为医学外科医生治疗骨折相关患者的新选择。与轴向,弯曲和扭转载荷情况下的单交叉和无交叉配置相比,这种新型的双交叉锁定结构具有卓越的生物力学稳定性。单交叉配置(模型2)在承受轴向载荷时发生并发症的风险最高。总之,双交叉锁定结构(模型3)显示出最大的潜力,可以作为医学外科医生治疗骨折相关患者的新选择。与轴向,弯曲和扭转载荷情况下的单交叉和无交叉配置相比,这种新型的双交叉锁定结构具有卓越的生物力学稳定性。

更新日期:2020-10-30
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