重建钢板固定锁骨干中段骨折的三维有限元生物力学分析  

Three-dimensional finite element analysis on biomechanics of reconstruction plate in fixing fracture of mid-clavicle

作　　者：阮国模[1] 苏佳灿[2] 苏忠良[1] 张春才[2] 

机构地区：[1]温州市第三人民医院骨科,325000 [2]上海第二军医大学附属长海医院骨科

出　　处：《浙江医学》2012年第5期323-325,共3页Zhejiang Medical Journal

摘　　要：目的 利用三维有限元分析方法所构建的三维有限元锁骨模型，对重建钢板治疗锁骨干骨折进行生物力学分析并探讨相关的生物力学意义。方法在锁骨三维有限元模型上进行模拟钻孔、重建钢板模拟固定，设定材料属性，然后进行三维有限元力学分析。结果（1）Vonmisese应力：最小应力值出现于50862号节点，位置处于34．1768、84．0147、-702．5mm，力值为0986467N／m^2；最大应力值出现于65097号节点，位置处于138．674、74．5003、-7535mm，力值为10703．8N／m^2。（2）应变：最小应变处于50361节点，最大应变处于39254节点，应变范围为0-2．3878e-008。（3）位移：最小位移处于9325节点，最大位移处于12337节点，位移范围为0-6．68641e-009m。（4）变形：能够清晰地显示整个整体的变形结果。结论在重建钢板固定锁骨三维有限元分析结果当中可以看到，应力总体上处于一个相对较为均匀的状态。从分析结果图可以看出，钢板固定周围的应力分布有一定程度集中，尤其是螺钉周围，有应力集中现象，这种应力集中对于早期维持骨折断端的稳定有着非常重要的作用；同时，在钢板与锁骨接触的部位，应力呈现一种平缓过渡状态，在钢板下方的锁骨部位接受较高应力的作用，表现在钢板对侧的螺钉周围应力密度明显较高，作为一对作用力与反作用力，有助于将锁骨骨折进行一个有效而坚强的固定。Objective To analyze the biomechanics of reconstruction plates in treating mid-clavicle fracture by three-di- mension finite element models （3-D FEM）. Methods After simulations of drilling and fixing with reconstructive plate on clavicle 3-D FEM, setting material properties, 3-D finite element biomechanical analysis was conducted. Results 1. Vonmisese stress： the least stress value presented in node 50862, locating in 34.1768 ram, 84.0147 ram, -702.5 ram, and the value was 0.986467 N/m2; the strongest one presented in node 65097, locating in 138.674 mm, 74.5003 ram, -753.5 ram,and the value was 10703.8 N/m2. 2. Stressing： the least stressing was located in node 50361 and the strongest in node 39254; stress range： 02.3878e-008. 3. Displacement： the smallest one was in the node 9325 and the biggest one in 12337; displacement range： 0 - 6.68641e-009m. 4.Transfiguration： the transfiguration revealed the whole results clearly. Conclusion Analysis from reconstructive plate on fixing the clavicle 3-D FEM shows that the stress is relatively equal as a whole; the stress distribution is focused on the surroundings of fixed plate at certain degree, especially near the bolt; the stress presents a mild transition where the plate contacted clavicle. There is a significantly increasing stress dense near the bolt opposite to the plate, reflecting that the clavicle under the plate receives stronger stress, which helps to form an efficient and strong fixation on clavicle fracture.

关 键 词：重建钢板 三维有限元分析 锁骨骨折 生物力学 

分 类 号：R681.8[医药卫生—骨科学]