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Structural analysis of the mandible by quantitative computed tomography.

S Percac¹, V Nikolić

¹Department of Anatomy, School of Medicine, University of Zagreb, Croatia.

Surgical and Radiologic Anatomy : SRA

|January 1, 1992

Summary

Quantitative computed tomography (QCT) reveals inner mandible structure. The study found less bone in fracture-prone areas, with compact bone being predominant.

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Area of Science:

Anatomy
Radiology
Orthodontics

Background:

Understanding mandibular bone structure is crucial for diagnosing conditions and planning treatments.
Noninvasive imaging techniques are preferred for analyzing bone density and morphology.
Previous studies have focused on external morphology, with less emphasis on internal quantitative analysis.

Purpose of the Study:

To present quantitative computed tomography (QCT) as a noninvasive method for analyzing inner mandibular bone structure.
To determine the relationship between compact and spongy bone and the total bone substance in different mandibular areas.
To identify mandibular regions with the least bone quantity, correlating with common fracture sites.

Main Methods:

CT-scanned mandibles from an osteological collection.
Analysis of densitometry curves at two horizontal levels.
Quantitative assessment of compact and spongy bone proportions and total bone substance.

Main Results:

The smallest bone quantity was observed in the mandibular neck and angle, areas prone to fractures.
The alveolar part of the mandible was thinner than the base, except in the angle region.
Compact bone was found to be predominant across all analyzed mandibular areas.

Conclusions:

QCT is an effective noninvasive method for quantifying mandibular bone structure.
Mandibular neck and angle exhibit lower bone density, highlighting their vulnerability to fractures.
Quantitative analysis of bone structure can inform clinical decision-making in oral and maxillofacial surgery and trauma management.

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