Calvarial thickness and its relation to cranial bone harvest

Area of Science:

• Anthropology
• Anatomy
• Forensic Science

Background:

• Understanding human skull morphology is essential for various scientific and medical applications.
• Previous research has indicated variability in skull thickness, but detailed topographic mapping is lacking.

Purpose of the Study:

• To quantify the variation in human skull thickness across different anatomical locations and between individuals.
• To create a detailed map of skull thickness for normative data in a large population.

Main Methods:

• Analysis of 281 dry human skulls from the Hamman-Todd osteological collection.
• Measurement of skull thickness at 40 points across the frontal, occipital, and parietal bones.
• Statistical analysis using repeated measures analysis of variance to identify significant predictors of skull thickness.

Main Results:

• A consistent pattern of increased skull thickness was observed towards the posterior parietal bones in all subgroups.
• The mean skull thickness across all measured locations was 6.32 mm, with significant regional variations.
• Age was not a significant factor in mean skull thickness, but sex-based differences were noted in the posterior parietal region.

Conclusions:

• The thickest skull regions were identified as the posterior parietal area in males and a specific region in the posterior parietal area for females.
• A comprehensive topographic map of human skull thickness was developed, providing normative data.
• This data aims to enhance surgical safety, particularly in cranial bone graft harvesting procedures.