A Partial Ossicular Replacement Prosthesis With a Concentric Ball Joint in the Headplate

2022-09-20 | journal article. A publication with affiliation to the University of Göttingen.

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​Bevis, Nicholas, Thomas Effertz, and Dirk Beutner. "A Partial Ossicular Replacement Prosthesis With a Concentric Ball Joint in the Headplate​." ​The Laryngoscope ​133, no. 7 (2022): ​lary.30390​. ​https://doi.org/10.1002/lary.30390.

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Authors
Bevis, Nicholas ; Effertz, Thomas ; Beutner, Dirk 
Abstract
Objective In passive middle ear prosthetics, rigid implants have proven successful in reconstructing the ossicular chain. However, these cannot fully replicate the physiology of the ossicular chain. Pressure fluctuations cause high stresses in rigid passive prostheses, which can result in dislocation, protrusion, and pre-tension in the annular ligament resulting in unsatisfactory hearing results. Methods In collaboration with MED-EL, we developed a new passive middle ear prosthesis that features a balanced, centered ball joint between the headplate and shaft of the prosthesis. We compared the sound transmission properties of this new prosthesis with those of a standard rigid prosthesis. Using Laser-Doppler-Vibrometry, we measured the sound-induced velocity of the stapes footplate relative to a given acoustic stimulus. Results The new prosthesis showed equivalent sound transmission characteristics compared to the rigid prosthesis, whereas retaining the ability to compensate for pressure fluctuations due to its ball joint. This ensures good transmission properties even during displacements of the tympanic membrane. Conclusion This development is a further step toward a physiological reconstruction of the ossicular chain.
Issue Date
20-September-2022
Journal
The Laryngoscope 
Organization
Klinik für Hals-Nasen-Ohrenheilkunde ; Universitätsmedizin Göttingen 
ISSN
0023-852X
eISSN
1531-4995
Language
English
Sponsor
MED-EL Medical Electronics https://doi.org/10.13039/501100018857

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