Applications of ion beam analysis to calcified tissue research

Area of Science:

• Nuclear Physics
• Materials Science
• Biomedical Engineering

Background:

• Calcified tissues, including teeth and bone, contain essential elements and trace elements that are crucial for their structure and function.
• Understanding the elemental composition and distribution in these tissues is vital for diagnosing and treating various diseases.
• Fluorine and trace elements play significant roles in the health of dental and bone tissues, and their altered concentrations can indicate pathological conditions.

Purpose of the Study:

• To develop and apply nondestructive ion beam analysis techniques for quantifying fluorine and trace elements in calcified tissues.
• To investigate the depth distribution of fluorine in teeth and bone samples.
• To simultaneously determine multiple elements in dental hard tissues and analyze their variations.

Main Methods:

• Prompt gamma activation analysis (PGAA) was used to determine fluorine concentrations and depth distributions via the F(ϱ,αγ)O reaction.
• Activation analysis with He-3 ions was employed to measure carbon concentrations.
• Proton-Induced X-ray Emission (PIXE) was developed for simultaneous determination of Ca, P, and trace elements in dental tissues.

Main Results:

• Fluorine concentrations and depth profiles were successfully measured in teeth and bone samples.
• Carbon was quantified using He-3 activation analysis.
• PIXE enabled the simultaneous determination of 17 elements (Na, Mg, Al, P, Cl, Ca, Cr, Mn, Fe, Ni, Cu, Zn, Sr, Br, Rb, Pb) in dental tissues, revealing significant variations within teeth.

Conclusions:

• Nondestructive ion beam analysis techniques are effective for elemental analysis of calcified tissues.
• These methods provide valuable data for studying metabolic bone diseases, renal diseases, and the impact of lead exposure.
• The detailed elemental mapping of dental tissues offers new avenues for understanding dental health and disease processes.