腭种植体支抗快速扩弓的三维有限元分析  

3-D Finite Element Study on Rapid Maxillary Expansion Using Implant Anchorage

作　　者：潘虹海[1,2] 黄跃[1] 杨正[1] 杨四维[1] 

机构地区：[1]泸州医学院附属口腔医院正畸科,泸州646000 [2]自贡市第四人民医院口腔科

出　　处：《四川大学学报（医学版）》2011年第6期831-834,共4页Journal of Sichuan University(Medical Sciences)

摘　　要：目的研究不同位置和数目腭种植体支抗在快速扩弓时颅面复合体的生物力学变化,为临床应用腭种植体支抗快速扩弓提供理论依据。方法应用MSC.Marc.mentat 2005R3软件,模拟上颌快速扩弓,以枕骨大孔边缘及顶骨、枕骨前部中点作为固定,种植体处施加扩弓力。设定扩弓力大小为80N,模拟不同位置及数目腭种植体支抗快速扩弓,分析不同加载条件对颅面复合体的影响。结果不同位置及数目腭种植体支抗快速扩弓时颅面复合体的应力分布和位移趋势较为一致,应力较大区域分布在鼻额缝、颧颌缝、鼻上颌缝、翼腭缝,腭中缝呈"V"形打开,种植体位于上颌尖牙和第一前磨牙之间时相应的应力和位移最大。结论快速扩弓时腭种植体数目与颅面复合体应力和位移大小无明显关联,腭种植体位置越靠前,其相应的应力和位移越大。Objective To evaluate the biomechanic changes of craniofacial complex with rapid maxillary expansion using implant anchorage.Methods Rapid maxillary expansion using implant anchorage was simulated with MSC.Marc.Mentat software,restrained at the region around the foramen magnum and the anterior middle point of parietale and foramen.In the area of implant surface,forces of 80 N were applied with rapid maxillary expansion.Different numbers and positions of implant anchorage were chosen.Their influences on the craniofacial complex were analysed.Results The stress distribution and displacement trend of the craniofacial complex under different conditions were approximate.The greatest stress appeared on the areas along the frontonasal suture,zygomaticomaxillary suture,nasomaxillary suture and pterygopalatal suture.Two halves of palatine were separated in a ＂V＂ shape.Maximal stress and displacement were found when the implant was located between maxillary canine and first premolar.Conclusion The numbers of implant are not associated with the size of stress and displacement.Greater stress and displacement occur when the implant position is in the front.

关 键 词：种植体支抗 上颌快速扩弓 颅面复合体 三维有限元 

分 类 号：R783.5[医药卫生—口腔医学]