Finite-element modelling of the normal and surgically repaired cat middle ear

Authors

  • H.M. Ladak Dept. of BioMed. Eng., McGill Univ., Montreal, Que., Canada
  • W. Ladak Dept. of BioMed. Eng., McGill Univ., Montreal, Que., Canada
  • R.J. Funnell Dept. of BioMed. Eng., McGill Univ., Montreal, Que., Canada

Keywords:

ear, finite element analysis, hearing, middle-ear ossicular chain, conductive hearing loss, ossicular discontinuity, incudal long process, stapes superstructure, malleus-stapes assembly, finite-element model, middle-ear surgery

Abstract

Discontinuity of the middle-ear ossicular chain results in conductive hearing loss. The most common type of ossicular discontinuity is caused by loss of the incudal long process; the second most common type is caused by loss of both the incudal long process and the stapes superstructure. When the incudal long process alone is missing, a prosthesis (e.g., ossicular bone graft) can be fitted between the manubrium of the malleus and the head of the stapes; the resulting structure is called a malleus-stapes assembly (MSA). When both the incudal long process and the stapes superstructure are missing, a prosthesis can be fitted between the manubrium and the stapedial footplate; this structure is called a malleus-footplate assembly (MFA). The MSA and the MFA do not result in the complete elimination of hearing loss. A quantitative understanding of the mechanics of the normal and surgically repaired middle ear should elucidate some of the reasons for this failure and would aid in the design of middle-ear prostheses. This paper presents a finite-element model of the normal cat middle ear. The model was modified to investigate the effects of middle-ear surgery. The models are limited to low frequencies and sound pressure levels

Published

1994-09-01

How to Cite

1.
Ladak H, Ladak W, Funnell R. Finite-element modelling of the normal and surgically repaired cat middle ear. Canadian Acoustics [Internet]. 1994Sep.1 [cited 2020Sep.24];22(3):91-2. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/866

Issue

Section

Proceedings of the Acoustics Week in Canada