title: An incus-body driving type piezoelectric middle ear implant design and evaluation in 3D computational model and temporal bone.
abstract: A new incus-body driving type transducer relying on piezoelectric stack, with broad frequency bandwidth, is proposed for use in a middle ear implant. To aid the design process of this transducer, a coupling biomechanical model of the human middle ear and the piezoelectric transducer was established by reverse engineering technology. The validity of this model was confirmed by comparing model predicted motions with experimental measurements. Based on this verified biomechanical model, the main parameters of the transducer were determined. And its power consumption was calculated. Finally, to verify the capability of the designed piezoelectric transducer, a human temporal bone experimental platform was built. And the dynamic characteristics and the stimulated performance of the piezoelectric transducer were tested. The result showed that stapes displacement stimulated by the transducer excitation at 10.5 V RMS was equivalent to that from acoustic stimulation at 100 dB SPL, which is an adequate stimulation to the ossicular chain. The corresponding power consumption is 0.31 mW per volt of excitation at 1 kHz, which is low enough for the transducer to be used in a middle ear implant. Besides, this transducer demonstrates high performance at high frequencies.
authors.affiliation: School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, China.
authors.forename: Houguang
authors.identifier: 0000-0002-5450-5958
authors.initials: H
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Mechanical System and Vibrations, Shanghai Jiaotong University, Shanghai 200240, China.
authors.forename: Zhushi
authors.initials: Z
authors.lastname: Rao
authors.affiliation: Department of Otorhinolaryngology, Zhongshan Hospital, Fudan University, Shanghai 200032, China.
authors.forename: Xinsheng
authors.initials: X
authors.lastname: Huang
authors.affiliation: School of Mechatronic Engineering, China University of Mining and Technology, Xuzhou 221116, China.
authors.forename: Gang
authors.initials: G
authors.lastname: Cheng
authors.affiliation: State Key Laboratory of Mechanical System and Vibrations, Shanghai Jiaotong University, Shanghai 200240, China.
authors.forename: Jiabin
authors.initials: J
authors.lastname: Tian
authors.affiliation: State Key Laboratory of Mechanical System and Vibrations, Shanghai Jiaotong University, Shanghai 200240, China.
authors.forename: Na
authors.initials: N
authors.lastname: Ta
mesh_terms: D001696:Biomechanical Phenomena; D003198:Computer Simulation; D004432:Ear, Middle; D006801:Humans; D007188:Incus; D008954:Models, Biological; D009998:Ossicular Prosthesis