Conclusion: A good short-term hearing improvement is gained by partial ossicular replacement prostheses with several common various materials. A better sound transmission in lower frequencies is obtained by partial ossicular replacement prostheses with hydroxyapatite ceramics, stainless steel and alumina ceramics. However, A better sound transmission in higher frequencies is gained by partial ossicular replacement prostheses with porous polyethylene and polytetrafluoroethylene. Considering a long-term effect on hearing improvement, they are better materials on hearing restoration because titanium, polytetrafluoroethylene and hydroxyapatite ceramics have a good biocompatibility for the patients. And these conclusions can provide certain reference values for human ear clinical studies. Objectives: This paper qualitatively and quantitatively studied the effect of partial ossicular replacement prostheses (PORPs) with several various materials on hearing restoration. Methods: The CT data of the right ear from a normal human body was digitalized and imported into PATRAN to establish a three dimension finite element model by self-compiling program, and then a frequency response analysis was made for the model using NASTRAN to study the effect of partial ossicular replacement prostheses with several various materials on hearing restoration. Results: the model was carried through a harmonic response analysis of norma:. ear structure and confirmed by the consistency in the calculated and experimental data after comparision.
收起[1]Shanghai Univ, Dept Civil Engn, Shanghai, Peoples R China.
[2]Fudan Univ, Zhongsan Hosp, Dept Otorhinolaryngol, Shanghai, Peoples R China.
(8.0+极速模式)