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. 2024 Oct 11;11(10):1015. doi: 10.3390/bioengineering11101015

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© 2024 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Injected HA volume and weeks needed to restore physiological middle ear pressure (type A tympanogram) for the control (A) and the stent side (B). Included are animals with regained type A tympanograms (green) and animals with type B tympanogram at the end of the observation period (red). A2 is not displayed in part (A) as it had no HA injection for its control. A7 is not displayed in part (B) due to the incorrect stent placement. The control sides of animals A1, A5, and A6 had no measurable ETD after the HA injection (grey).