Digital image analysis of cadaver mandibular trabecular bone patterns

Area of Science:

• Dental radiology
• Biomedical imaging
• Bone histology

Background:

• Radiographic trabecular patterns are a key diagnostic feature in dentistry.
• The precise origin of these patterns, specifically the contribution of different bone types, requires clarification.

Purpose of the Study:

• To investigate the source of radiographic trabecular patterns.
• To determine the combined contribution of trabecular and endosteal bone to radiographic appearance.

Main Methods:

• Sequential removal of trabecular and endosteal bone from cadaver mandible sections.
• Standardized direct digital radiography after each bone removal stage.
• Quantification of radiographic changes using four digital image analysis techniques: gray levels, histograms, skeletonization (ends/segments), and fractal analysis.

Main Results:

• All four digital image analysis methods showed highly significant changes (P < 0.01) with progressive bone removal.
• Skeletonization (trabecular ends and segments) and fractal analysis demonstrated significant changes over time.
• Gray levels and histograms also yielded significant measurement changes, indicating sensitivity to bone structure alterations.

Conclusions:

• Digital image analysis consistently detected radiographic differences following sequential bone removal.
• Both cancellous and endosteal bone contribute to the radiographic structures identified as trabeculae.
• The findings confirm that trabecular and endosteal bone together form the composite structure visualized on intraoral radiographs.