The Optical Coherence Tomography and Raman Spectroscopy for Sensing of the Bone Demineralization Process

Area of Science:

• Biomedical Optics
• Materials Science
• Skeletal Biology

Background:

• Bone demineralization is a critical factor in skeletal diseases.
• Accurate monitoring of bone demineralization is essential for effective treatment and patient safety.
• Current methods for assessing bone mineralization may have limitations in real-time or detailed analysis.

Purpose of the Study:

• To investigate novel optical techniques for evaluating bone demineralization.
• To assess the feasibility of using polarization-sensitive optical coherence tomography (PS-OCT) and Raman spectroscopy for this purpose.
• To establish a correlation between hydroxyapatite content and optical properties of bone during demineralization.

Main Methods:

• Utilized chicken bone samples subjected to demineralization in 10% acetic acid.
• Employed polarization-sensitive optical coherence tomography (PS-OCT) for structural and polarization property analysis.
• Applied Raman spectroscopy to confirm hydroxyapatite content and track its degradation rate.

Main Results:

• PS-OCT provided images reflecting changes in bone structure and polarization properties (retardation angles).
• Raman spectroscopy confirmed the progressive disappearance of hydroxyapatite.
• A correlation was observed between OCT imaging and hydroxyapatite content, indicating the potential of PS-OCT to monitor mineralization changes.
• The study established the speed of the demineralization process.

Conclusions:

• The combined use of PS-OCT and Raman spectroscopy offers a promising approach for non-invasive monitoring of bone demineralization.
• These optical methods demonstrate potential for clinical applications in assessing bone health and guiding treatment.
• Further research is warranted to validate these techniques for broader diagnostic use.