Guidelines for Micro-Computed Tomography Analysis of Rodent Dentoalveolar Tissues

Area of Science:

• Life Sciences
• Biomedical Imaging
• Dental Research

Background:

• Micro-computed tomography (μCT) is vital for analyzing mineralized and non-mineralized tissues.
• Lack of standardized μCT protocols hinders data interpretation and inter-study comparisons, especially for the complex dentoalveolar complex.
• The dentoalveolar complex involves four mineralized tissues (enamel, dentin, cementum, alveolar bone) and adjacent soft tissues (pulp, periodontal ligament).

Purpose of the Study:

• To introduce practical guidelines for μCT analysis of rodent dentoalveolar tissues.
• To address challenges in analyzing tissues with diverse compositions and densities.
• To promote transparency, reproducibility, and best practices in μCT data acquisition and analysis.

Main Methods:

• Optimization of μCT scan parameters (filters, voltage, voxel size, integration time).
• Development of reproducible sample orientation techniques.
• Establishment of methods for defining regions of interest, tissue segmentation, and interpretation of findings.
• Application of techniques to genetically engineered mouse models with specific tissue phenotypes.

Main Results:

• Demonstration of techniques for successful μCT analysis of rodent dentoalveolar tissues.
• Illustrative examples showcasing analysis of enamel, dentin, cementum, and alveolar bone.
• Guidelines provided for optimizing scans, orienting samples, defining regions, segmenting tissues, and reporting results.

Conclusions:

• Standardized μCT protocols are essential for reliable analysis of the dentoalveolar complex.
• The proposed guidelines enhance transparency and reproducibility in μCT studies.
• These μCT analysis frameworks can be extrapolated to various other biological tissues.