Department of Orthopedics, The 184th Hospital of PLA, Spinal Surgery Treatment Center of Nanjing Military Region, Yingtan, Jiangxi Province 335000, China.
Department of Orthopedics, General Hospital of Chengdu Command, Chengdu, Sichuan Province 610083, China.
J Healthc Eng. 2017;2017:8590251. doi: 10.1155/2017/8590251. Epub 2017 Jun 18.
In this study, we developed and validated a refined three-dimensional finite element model of middle femoral comminuted fracture to compare the biomechanical stability after two kinds of plate fixation: a newly designed assembly locking compression plate (NALCP) and a locking compression plate (LCP). CT data of a male volunteer was converted to middle femoral comminuted fracture finite element analysis model. The fracture was fixated by NALCP and LCP. Stress distributions were observed. Under slow walking load and torsion load, the stress distribution tendency of the two plates was roughly uniform. The anterolateral femur was the tension stress area, and the bone block shifted toward the anterolateral femur. Maximum stress was found on the lateral border of the number 5 countersink of the plate. Under a slow walking load, the NALCP maximum stress was 2.160+03 MPa and the LCP was 8.561+02 MPa. Under torsion load, the NALCP maximum stress was 2.260+03 MPa and the LCP was 6.813+02 MPa. Based on those results of finite element analysis, the NALCP can provide adequate mechanical stability for comminuted fractures, which would help fixate the bone block and promote bone healing.
在这项研究中，我们开发并验证了一个改良的股骨中段粉碎性骨折三维有限元模型，以比较两种钢板固定后的生物力学稳定性：一种新设计的组合式锁定加压接骨板（NALCP）和锁定加压接骨板（LCP）。将一名男性志愿者的 CT 数据转换为股骨中段粉碎性骨折有限元分析模型。骨折用 NALCP 和 LCP 固定。观察了应力分布。在慢步行走负荷和扭转负荷下，两种钢板的应力分布趋势大致均匀。前外侧股骨为张应力区，骨块向股前外侧移位。最大应力位于钢板第 5 个埋头孔的外侧边缘。在慢步行走负荷下，NALCP 的最大应力为 2.160+03 MPa，LCP 为 8.561+02 MPa。在扭转负荷下，NALCP 的最大应力为 2.260+03 MPa，LCP 为 6.813+02 MPa。基于这些有限元分析的结果，NALCP 可为粉碎性骨折提供足够的机械稳定性，有助于固定骨块并促进骨愈合。
