全听骨赝复物重建听骨链的有限元分析  

Finite element analysis of the middle ear reconstructed with total ossicular replacement prosthesis

作　　者：杨琳[1] 戴培东[1] 张天宇[2] 王正敏[2] 

机构地区：[1]复旦大学附属眼耳鼻喉科医院实验中心,上海200031 [2]复旦大学附属眼耳鼻喉科医院耳鼻喉科,上海200031

出　　处：《中国眼耳鼻喉科杂志》2010年第3期148-149,I0001,I0002,共4页Chinese Journal of Ophthalmology and Otorhinolaryngology

基　　金：上海市科委创新计划(074119512)

摘　　要：目的观察在声压激励下,锤骨柄与镫骨足板之间放置钛全听骨赝复物(total ossicular replace-ment prosthesis,TORP)有限元模型的力学行为特性。方法在ABAQUS有限元软件中构建左耳镫骨足板直接放置钛TORP的三维实体模型,并进行静力学与动力学分析。结果钛TORP模型与正常听骨链位移响应不同;钛TORP模型锤骨柄与镫骨足板有活塞方向位移,同时伴有斜行位移;模态频率与振型在700Hz以上有类似趋势,700Hz以下TORP模型频率随频阶递增较缓慢。结论钛质听骨赝复物做桥接体可能有较好的高频响应;放置赝复物时应考虑力线方向,赝复物镫骨端应与镫骨足板面垂直,以增加活塞运动的有效能量传递,避免向其他方向倾斜产生分力运动。Objective To observe the dynamical behavior of the middle ear reconstructed with total ossicular re- placement prosthesis （TORP） with the sound pressure load on the tympanic membrane. Methods A three-dimensional finite element model of the middle ear with TORP on the stapes footplate was built and its static and dynamic responses were analyzed. Results Displacement responses were different between TORP model and normal ear model. The piston motion of footplate of TORP model was accompanied by a side displacement. Modal frequencies and mode shapes of these two models were similar at 700 Hz and above, and the modal frequency of the TORP model increased more slowly below 700 Hz. Conclusions Titanium prosthesis has a better high-frequency response. The direction of force line of the pros- thesis should be considered when it is implanted. The column of prosthesis should be perpendicular to the stapes footplate to increase an effective energy transfer of piston motion and to avoid side displacement.

关 键 词：听骨链重建术 全听骨赝复物 有限元分析 

分 类 号：R764[医药卫生—耳鼻咽喉科]