Modelling healing of geriatric distal femoral fracture fixation for pre-operative planning

对于股骨远端骨折的手术治疗和康复的最佳实践，目前还没有达成共识。由于大量的力学参数，对理想固定结构配置的研究产生了相互矛盾的结果。拟议的项目涉及开发和验证股骨远端骨折手术管理的术前计划系统。将开发一个有限元模型来模拟骨-固定器结构内的力学条件，并将开发一个模糊逻辑算法来根据模拟的力学条件对骨愈合进行建模。该系统将采取患者的数据输入，包括骨折的模式和几何形状和模拟骨折愈合时间的各种固定配置，以确定组合手术和术后管理选项与最快的愈合时间。初步工作已经调查了接触模拟模型的不同计算费用的螺钉-骨界面锁定钢板固定fractions。需要额外的工作，然而，螺杆轴螺纹的建模在计算上显得过于昂贵。计划的实验验证测试的方法进行了说明。未来的工作完成和测试所提出的系统的验证。

There is currently no consensus on best practices in the surgical management and rehabilitation of distal femoral fractures. Research into ideal fixation construct configurations yields conflicting results due to the large number of mechanical parameters. The proposed project involves the development and validation of a pre-operative planning system for surgical management of distal femoral fractures. A finite element model will be developed to simulate the mechanical conditions within the fracture-fixator construct and a fuzzy logics algorithm will be developed to model bone healing based on the simulated mechanical conditions. The system will take patient data inputs including fracture pattern and geometry and simulate the fracture healing time for a variety of fixation configurations to identify the combination operative and post-operative management option with the fastest healing time.Preliminary work has investigated contact simulation models of varying computational expense for the screw-bone interface in locking plate fixated fractures. Additional work is required, however, modelling of the screw shaft threads appears prohibitively computationally expensive. Planned methodology for experimental validation tests are described. Future work for the completion and testing for validation of the proposed system are described.