Department of Mechanical Engineering, National Central University, No. 300, Zhongda Rd., Zhongli District, Taoyuan City 32001, Taiwan.
J Mech Behav Biomed Mater. 2018 Jan;77:642-648. doi: 10.1016/j.jmbbm.2017.10.025. Epub 2017 Nov 6.
Screw and plate fixation is commonly used to treat bone fractures. A prototype application (APP) for presurgical simulation was developed and validated by comparing it with current analytical approach and other models. In this APP, alternative plate designs and materials to limit the effects of stress shielding could be tested. In addition, the number and position of screws and the gap between bone and plate that achieved acceptable stability were predicted. The fixation stability providing a situation of interfragmentary strain between 2% and 10% is necessary for callus formation. However, improving the fixation stability leads to a stress shielding effect. The simultaneous alleviation of stress shielding and maintenance of stability are important in fracture healing. In this study, the feasibility of creating a specialized APP to evaluate different screw-plate configurations for diaphyseal femoral fractures was investigated. The ultimate goal is to extend this technique to computer-assisted preoperative planning for orthopedic surgery.
螺丝钉和钢板固定法通常用于治疗骨折。本研究开发并验证了一种用于术前模拟的原型应用程序（APP），该 APP 可通过与当前分析方法和其他模型进行比较来实现。在该 APP 中，可以测试替代的钢板设计和材料，以限制应力遮挡的影响。此外，还可以预测获得可接受稳定性的螺钉数量和位置，以及骨与钢板之间的间隙。为了形成骨痂，固定稳定性需要提供介于 2%和 10%之间的骨折间应变的情况。然而，提高固定稳定性会导致应力屏蔽效应。在骨折愈合过程中，同时减轻应力屏蔽并维持稳定性非常重要。在这项研究中，研究了创建专门的 APP 来评估骨干股骨骨折不同螺丝钉-钢板组合的可行性。最终目标是将该技术扩展到骨科手术的计算机辅助术前规划中。
