3D reconstruction based on hard tissue microtome cross-section pictures in dentistry

Area of Science:

• Dental technology
• Biomedical imaging
• Quantitative analysis

Background:

• Accurate 3D volume measurement is crucial in dentistry for diagnosis and treatment planning.
• Computerized 3D surface analysis methods require validation for clinical application.

Purpose of the Study:

• To evaluate the accuracy of a computerized 3D surface analyzing and volume measuring technique in dentistry.
• To determine the influence of section thickness and number on the accuracy of 3D parameter measurements.

Main Methods:

• Two types of test objects and 11 human incisor roots were analyzed.
• Samples were cross-sectioned using a hard tissue microtome into 200 micrometer thick sections.
• Sections were photographed, projected onto a graphical tablet, and analyzed using computer software.
• The impact of varying section inclusion rates (10 to 2) on results was modeled.

Main Results:

• The computerized 3D surface analysis method proved suitable for approximating and analyzing 3D parameters.
• Measurements obtained using 200-300 micrometer section thickness were approximately 8-21% lower than true values.
• Section thickness significantly influences the accuracy of the calculated 3D parameters.

Conclusions:

• The computerized 3D surface analysis method is a viable tool for dental applications.
• Careful consideration of section thickness (200-300 micrometers) is necessary to account for potential underestimation of volumes.
• Further optimization of sectioning protocols may enhance measurement precision.