Dependability of Electrode to Modiolus Distance in Patients Specific Electrode Selection: A Cadaveric Model Study

Objective This study aims to discern the disparities in the electrode‐to‐modiolus distance (EMD) between cochleostomy and round window approaches when performed sequentially in the same temporal bone. Additionally, the study seeks to identify the cochlear metrics that contribute to these differences. Methodology A cross‐sectional study was conducted, involving the sequential insertion of a 12‐electrode array through both round window and cochleostomy approaches in cadaveric temporal bones. Postimplantation high‐resolution CT scans were employed to calculate various parameters. Results A total of 12 temporal bones were included in the imaging analysis, revealing a mean cochlear duct length of 32.892 mm. The EMD demonstrated a gradual increase from electrode 1 (C1) in the apex (1.9 ± 0.07 mm; n = 24) to electrode 12 (C12) in the basal turn (4.6 ± 0.24 mm; n = 12; p