Non-decalcified human teeth sample preparation method for MALDI mass spectrometry imaging

Area of Science:

• Biomolecular analysis
• Dental research
• Mass spectrometry imaging

Background:

• Human teeth contain valuable biological and environmental records.
• Analyzing teeth requires techniques with spatial and chemical resolution.
• Decalcification for analysis can compromise molecular content.

Purpose of the Study:

• To develop a method for analyzing non-decalcified human teeth using MALDI MSI.
• To overcome challenges in preparing hard and brittle dental tissues for molecular analysis.

Main Methods:

• A novel sample preparation technique involving cryofilm embedding and specific cryostat blade angles.
• Analysis of non-decalcified human teeth sections.
• Application of various MALDI matrices for imaging.

Main Results:

• Successful preparation of non-decalcified human teeth for MALDI MSI.
• Demonstration of spatial distribution of biomolecules in teeth.
• Validation of the cryofilm embedding method for dental tissue analysis.

Conclusions:

• The developed method enables MALDI MSI analysis of non-decalcified human teeth.
• This technique preserves molecular integrity for biomolecular mapping.
• Provides a foundation for studying spatial and temporal distribution of small molecules in teeth.