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Quantification of root caries using optical coherence tomography and microradiography: a correlational study.
Bennett T Amaechi1, Adrian Gh Podoleanu, Gleb Komarov
1Cariology Unit, Department of Community Dentistry, University of Texas Health Science Center at San Antonio, Texas, USA. amaechi@uthscsa.edu
Oral Health & Preventive Dentistry
|November 22, 2005
Summary
Optical Coherence Tomography (OCT) can detect early root caries by measuring reflectivity loss, which correlates with mineral loss. This technology offers a quantitative method to monitor demineralization, similar to transverse microradiography (TMR).
Area of Science:
- Biomedical Optics
- Dental Research
- Materials Science
Background:
- Transverse microradiography (TMR) is a standard for quantifying mineral loss in demineralized tooth tissue.
- Root caries presents a significant challenge in dental health, requiring accurate monitoring methods.
Purpose of the Study:
- To investigate the use of en-face Optical Coherence Tomography (OCT) for detecting and quantitatively monitoring mineral changes in root caries.
- To correlate OCT findings with established TMR measurements.
Main Methods:
- Utilized an OCT system capable of A-scan, B-scan, and C-scan imaging.
- Applied OCT to quantitatively assess root caries development under specific power (250 microW) and wavelength (850 nm) settings.
Main Results:
- OCT images revealed caries lesions as areas of reduced reflectivity.
- Quantitative analysis showed decreased tissue reflectivity with increased demineralization.
- A strong linear correlation (r=0.957) was found between mineral loss by TMR and reflectivity loss measured by OCT.
Conclusions:
- OCT is a viable technology for detecting incipient root caries.
- OCT-measured reflectivity loss in demineralized root tissue correlates with actual mineral loss.