Visualizing physiological sclerotic dentin via micro-computed tomography: A pilot study.

Area of Science:

• Dental Anatomy
• Radiology
• Biomaterials Science

Background:

• Physiological dentin sclerosis is an age-related change in tooth roots, previously visualized only in 2D.
• Understanding this phenomenon is crucial for dental diagnostics and treatment planning.

Purpose of the Study:

• To propose and validate a novel 3D method for visualizing and quantifying physiological sclerotic dentin.
• To utilize density-based micro-computed tomography (micro-CT) gray values for this purpose.

Main Methods:

• Forty single-rooted premolars from the Malay male population of known chronological age were scanned using micro-CT.
• Three-dimensional datasets were reconstructed, and volumetric analysis of root dentin was performed using FIJI (ImageJ) software.

Main Results:

• Micro-CT successfully enabled the visualization, isolation, and quantification of high-density areas corresponding to sclerotic dentin.
• A characteristic butterfly-shaped pattern was observed in the gray value profile.
• Premolars from individuals aged 31-60 years showed a larger sclerotic dentin area compared to younger teeth.

Conclusions:

• This pilot study demonstrates the feasibility of using micro-CT for 3D visualization and measurement of physiological sclerotic dentin.
• The method's accuracy depends on micro-CT scanner capabilities and image processing software.
• Further research with advanced micro-CT techniques is recommended to enhance image quality.