锁骨个性化锁定接骨板模型的建立及有限元分析

发布时间：2018-03-10 18:33

本文选题：锁骨　切入点：个性化锁定钛质接骨板　出处：《山西医科大学》2015年硕士论文　论文类型：学位论文

【摘要】：目的:1.建立锁骨三维有限元模型。2.根据锁骨模型建立锁骨锁定接骨板模型,此模型可通过三D打印技术得到适合单个个体的个性化接骨板。3.在折弯和扭转两种受力状况下,评估锁定接骨板有限元模型的应力分布情况。4.分析锁骨接骨板应力分布,明确易断裂部位,为有效减少锁骨内固定术后钢板断裂的预防提供理论依据。方法:采用64排螺旋CT对成年健康男性锁骨进行平扫,得到该男性锁骨的二维图像数据,运用Mimicsl0.0软件将所得数据分析、建立锁骨三维有限元模型,根据锁骨模型运用UG软件建立锁骨锁定接骨板模型。利用abaqus软件评估锁定接骨板分别向下给予200N、500N的力进行折弯及200N.mm、500N.mm进行轴向扭转,模拟锁骨锁定钛板的受力情况,进一步对其应力分布进行分析。结果:1.构建了贴合锁骨钛板接骨板的三维模型和三维有限元模型。2.S型锁骨锁定型钛板与直型钛板三维有限元模型,在近端固定,远端向下垂直钛板长轴方向折弯,应力最大部位均位于中间孔及周围,但S型钛板较直型钛板应力更加分散。3.S型锁骨锁定型钛板与直型钛板三维有限元模型,在近端固定,远端轴向扭转,其应力最大集中部位均位于中间孔及周围,应力分布无明显变化。结论:本课题根据CT扫描原始数据构建的锁骨钛合金接骨板的三维实体模型,与骨的贴合性良好,此模型可通过三D打印技术得到适合单个个体的个性化接骨板。有限元分析结果基本可以模拟接骨板的实际受力情况。通过对两种形状的锁骨接骨板进行有限元分析,在侧方折弯及轴向扭转受力情况下,得出7孔钛板的最大应力分布位于中心孔正中。实际手术操作中,锁骨骨折断端与旷置锁定孔正中存在应力叠加,钛板放置若能避开该应力集中处,可有效避免术后断板发生,为临床实际操作提供理论指导,并为之后对其他类型钛质接骨板的生物力学分析提供了参考以及技术路线。
[Abstract]:Objective: 1.To establish a three-dimensional finite element model of clavicle. According to the model of clavicle, a model of clavicular locking plate was established. The model can be used to obtain the individualized plate of clavicle by 3D printing technology. Under the condition of bending and torsion, To evaluate the stress distribution of the locking plate finite element model. 4. To analyze the stress distribution of the clavicle plate and determine the fracture site. Methods: 64 slice spiral CT was used to scan the clavicle of adult healthy male, and the two dimensional image data of the male clavicle were obtained. The three-dimensional finite element model of clavicle was established by analyzing the data with Mimicsl0.0 software. According to the clavicle model, the clavicle locking plate model was established by UG software. The locking plate was evaluated by abaqus software for bending and axial torsion of 200Nmmm500N.mm, respectively. The stress distribution was further analyzed. Results 1. Three-dimensional model of clavicular titanium plate and three-dimensional finite element model .2.2.S type locked titanium plate and straight titanium plate were constructed and fixed at the proximal end. The distal vertical vertical titanium plate was bent along the long axis and the maximum stress was located in and around the middle hole. However, the stress of S type titanium plate was more dispersed than that of straight titanium plate. 3. 3. 3. The three dimensional finite element model of clavicle locking titanium plate and straight titanium plate were fixed at the proximal end of the plate. The maximum stress concentration of distal axial torsion is located in and around the middle hole, and there is no obvious change in stress distribution. Conclusion: the 3D solid model of titanium alloy clavicle plate was constructed based on the original CT scan data. Good fit with bone, The model can be used to obtain the individualized plate suitable for individual by 3D printing technology. The results of finite element analysis can simulate the actual force of the plate, and the two kinds of clavicle plate are analyzed by finite element method. Under the condition of lateral bending and axial torsion, the maximum stress distribution of the 7 hole titanium plate is found to be in the center of the central hole. In the actual operation, there is a stress superposition between the broken end of the clavicle fracture and the center of the open locking hole. If the titanium plate can avoid the stress concentration, it can effectively avoid the breakage after operation, provide theoretical guidance for clinical practice, and provide a reference and technical route for the biomechanical analysis of other types of titanium plate.
【学位授予单位】：山西医科大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：R687.3

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