Forsus与Ⅱ类牵引矫治下颌后缩的力系仿真分析及对比研究  

Simulation analysis of the stress and displacement on mandible under Forsus and Ⅱ elastics when protruding mandible

作　　者：李丽华[1] 宋锦璘[2] 米方林[1] 方平[3] 秦小慧[1] 伍建容[1] 

机构地区：[1]川北医学院附属医院口腔科,四川南充637000 [2]重庆医科大学附属口腔医院正畸科,重庆401147 [3]川北医学院附属医院儿科,四川南充637000

出　　处：《川北医学院学报》2013年第2期121-124,共4页Journal of North Sichuan Medical College

基　　金：重庆市教育委员会科学技术研究项目(kj060316);川北医学院苗圃基金(MP-ZK-43)

摘　　要：目的:构建具有一定粘弹塑性的矫治下颌后缩的三维有限元模型,对比研究Forsus与Ⅱ类牵引两种不同矫治方式矫治下颌后缩对下颌骨旋转和前移趋势的影响,为临床应用提供一定的参考。方法:在前期构建的三维有限元模型基础上,分别模拟25°加载角度下Forsus与Ⅱ类牵引分别矫治下颌后缩所引起的"下颌骨-颞下颌关节"的应力、位移变化和旋转趋势。结果:Forsus与Ⅱ类牵引25°加载角度下最大位移都发生在颏部,分别为5.206 mm和5.483 mm。Forsus加载应力较大值在髁突颈,为1.334 Mpa,Ⅱ类牵引加载髁突颈最大压应力为1.167 MPa。结论:Forsus与Ⅱ类牵引都是适合矫治下颌后缩的有效方式,值得推广。Objective：Built an elastic 3D model of Mandibular retrusion correction and made Comparative studies on the effects of Forsus and 11 elastics corrections on Mandibular rotation and forward to provide some reference for clinical application. Methods：Ba- sing on the pre-buih 3D model,the 25 ° working conditions were simulated to study the trends change of stresses,displacements and ro- tations of ＂Mandible-Temporomandibular Joint＂ respectively. Results：When the loading angle was 25°,the maximum displacements of Forsus and II elastics corrections were 5. 206 ram,5. 483 mm and occurred at chin. The maximum loading stress of Forsus was 1. 334 Mp and occurred at condylar neck,while the maximum loading stress of II elastics was 1. 167 Mp. Conclusion： II elastics and Forsus were effective Mandibular retrusion corrections and worth promoting.

关 键 词：Ⅱ类牵引 FORSUS 下颌后缩 生物力学 

分 类 号：R783[医药卫生—口腔医学]