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This study investigates the mechanical optimization of a middle ear prosthesis through finite element modeling under a 90 dB sound pressure level across frequencies from 250 to 8000 Hz. This work used a finite element model of the human auditory system to assess stress-displacement behavior. Three prosthesis geometries were evaluated (PN1 = 3 mm, PN2 = 4 mm, PN3 = 6 mm); PN2 exhibited the most effective mechanical response with a peak stress of 4.0E-09 MPa, signifying excellent structural equilibrium. The primary aim was to ascertain the effects of these geometric and material modifications on prosthesis durability and dependability. Of the materials evaluated, Ti25Nb25Zr demonstrated the most excellent stability and resistance, followed by Titanium Grade 2. PLA and bone cement, although achieving high stress maxima (7.5E-08 MPa), experienced sudden failure owing to their brittle characteristics. The simulation results demonstrated a robust correlation with laser Doppler vibrometry data, confirming the model’s predictive accuracy.
Eddine et al. (Thu,) studied this question.