Numerical Simulation and Study about Partial Ossicular Replacement Prostheses with Several Various Materials on Hearing Restoration

Abstract

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 mode1by 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 normal ear structure and confirmed by the consistency in the calculated and experimental data after comparision.