镫骨赝附体与砧骨长突连接方式对声音传导的有限元分析  

Finite Element Analysis the Ring Diameter ofJunction between Stapes Protheses and Incus Long Process on Sound Transmission in the Middle Ear after Stapes Replacement

作　　者：谢晓凤[1] 黄新生[1] 姚文娟[2] 王建中[1] 付黎杰[2] 刘骏帧[3] 

机构地区：[1]复旦大学附属中山医院耳鼻喉科,上海200032 [2]上海大学应用数学和力学研究所,上海200072 [3]复旦大学附属中山医院放射科,上海200032

出　　处：《中国临床医学》2008年第3期397-399,共3页Chinese Journal of Clinical Medicine

基　　金：上海市卫生局科技发展基金(项目编号044077)

摘　　要：目的:探讨镫骨与砧骨长突的连接方式对声音传导的影响,以指导镫骨手术。方法:根据复旦大学附属中山医院提供的人体正常耳CT扫描结果,用自编软件将CT扫描数值化并导入PATRAN重建三维有限元模型,应用动力学的传导振动原理,对正常的听小骨结构进行动力数值计算分析,并与目前已报道的试验结果对比。对采用环型置换术式,用不同环直径的镫骨赝附体所重建的听骨链结构进行动力数值计算分析,并与正常的听骨链结构力学行为进行对比。结果:在环型镫骨置换术中,镫骨赝附体与砧骨长突连接处环直径的大小对镫骨的振幅有影响,即当置换环直径越小时,镫骨赝附体振幅越接近正常人体,患者听力恢复效果越佳。结论:镫骨赝附体与砧骨长突连接处环直径的大小对患者术后的听力恢复有影响。Objective：To evaluate the ring diameter of junction between stapes protheses and incus long process on sound transmission in the middle ear after stapes replacement,and to use this information to guide stapes surgery.Methods：The CT data of ossicle from Zhongshan Hospital of Fudan University,were digitalized and imported into PATRAN（a world class commercial software.） to build a 3 dimension finite element model（FEM）.Then the ossicle model was analyzed based on dynamic transmitting vibration principles and the calculation results were evaluated and compared with results from examination.Using stapes protheses of different ring diameter to reconstruct Ossicle chain in stapes replacement and analyzed based on dynamic transmitting vibration principles,the calculation results were evaluated and compared with natural Ossicle chain.Results：The ring diameter of junction between stapes protheses and incus long process can effect the amplitude of protheses in ring stapes replacement.The smaller the ring diameter,the amplitude of protheses is closer to the normal,and the hearing recovering effect will be better.Conclusion：The ring diameter of junction between stapes protheses and incus long process can effect the hearing recovering after stapes replacement.

关 键 词：听小骨 有限元 镫骨置换 手术效果 

分 类 号：R764.5[医药卫生—耳鼻咽喉科]