Measurements of internal auditory meatus by polytomography. 1. Normal subjects

Area of Science:

• Radiology
• Otolaryngology
• Anatomy

Background:

• Polytomography is crucial for visualizing the internal auditory meatus (IAM).
• Understanding normal IAM measurements is vital for accurate radiograph interpretation.
• Previous studies noted variability in IAM dimensions, but consistency between sides in individuals.

Purpose of the Study:

• To investigate the relationship between IAM dimensions and cranial development.
• To explore the correlation between IAM measurements and temporal bone pneumatization.
• To establish normative data for IAM dimensions in relation to growth factors.

Main Methods:

• Utilized polytomography for clear visualization of the IAM.
• Analyzed data from 300 patients without VIII nerve lesions.
• Assessed the vertical diameter and posterior canal wall length of the IAM.
• Correlated IAM measurements with skull growth and temporal bone pneumatization.

Main Results:

• No statistically significant correlation was found between IAM vertical diameter and skull growth.
• No statistically significant correlation was observed between IAM posterior canal wall length and skull growth.
• No significant correlation was identified between IAM dimensions and temporal bone pneumatization.

Conclusions:

• IAM measurements do not appear to be significantly influenced by skull growth or temporal bone pneumatization.
• Findings suggest that IAM dimensions are relatively independent of these developmental factors.
• Further research may be needed to fully elucidate factors affecting IAM morphology.