Backscattered electron imaging of dental tissues

Area of Science:

• Dental research
• Materials science
• Microscopy

Background:

• Understanding dental tissue mineralization is crucial for diagnostics and treatments.
• Previous imaging techniques had limitations in resolving microscopic mineral details.

Purpose of the Study:

• To present novel scanning electron microscopy (SEM) methods for enhanced dental tissue imaging.
• To investigate the mineralization processes and structural variations in enamel, dentine, and cementum.

Main Methods:

• Developed new specimen preparation techniques for SEM, including oxygen plasma ashing and deproteinisation.
• Utilized backscattered electron (BSE) imaging for charge-free topographic and density contrast.
• Employed diamond micromilling for creating flat surfaces on methacrylate-embedded samples.

Main Results:

• Achieved improved imaging of microscopic mineral particles in dental tissues.
• Detected variations in mineral density within enamel prisms, correlating with light microscopy observations.
• Identified a dense mineralization center in dentine calcospherites and compared acellular cement mineralization to dentine.

Conclusions:

• Advanced SEM techniques significantly enhance the visualization of dental tissue mineralization.
• These methods provide new insights into the microstructural variations of enamel, dentine, and cementum.
• The findings contribute to a better understanding of dental tissue development and integrity.