Finite element and experimental modeling of jaw movement-induced deformations in the human earcanal.

Comput Biol Med

Department of Mechanical Engineering, École de technologie superieure, Montreal, H3C1K3, QC, Canada.

Published: November 2024

As ear-related technologies proliferate, optimizing comfort, retention, and battery life is crucial for enhancing user experience. A thorough understanding of the anatomical interaction between the temporomandibular joint (TMJ) and the earcanal during mouth-opening is essential. This study develops a finite element model and an experimental setup to investigate the biomechanical coupling between the TMJ and the earcanal. We analyze reverse-static deformations, focusing on cartilage-bone junction geometry, mandibular condyle location, and concha mobility. The earcanal geometry is assessed across five cross-sections with seven key dimensions measured. The results indicate that the deformations in cantilever-beam-like models closely match the reference geometry in both approaches, particularly in the lateral region. These findings suggest that a dynamic motion model of the earcanal, accurately simulating its behavior, is feasible.

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http://dx.doi.org/10.1016/j.compbiomed.2024.109125DOI Listing

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