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Journal of Dental Research
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Biomaterials & Bioengineering

Remineralization of Enamel Caries Can Decrease Optical Reflectivity

R.S. Jones and D. Fried

Department of Preventive and Restorative Dental Sciences, Box 0758, 707 Parnassus Ave., University of California, San Francisco, San Francisco, CA 94143-0758, USA; dfried{at}itsa.ucsf.edu

The remineralization of enamel caries can lead to distinct optical changes within a lesion. We hypothesized that the restoration of mineral volume would result in a measurable decrease in the depth-resolved reflectivity of polarized light from the lesion. To test this hypothesis, we measured optical changes in artificial caries undergoing remineralization as a function of depth, using Polarization-sensitive Optical Coherence Tomography (PS-OCT). Lesions were imaged non-destructively before and after exposure to a remineralization regimen. After imaging, microradiographs of histological thin sections indicated that the significant reflectivity reduction measured by PS-OCT accurately represented the increase in mineral content within a larger repaired surface zone. Mineral volume changes arising from remineralization can be measured on the basis of the optical reflectivity of the lesion.

Key Words: artificial caries • early caries • diagnostic systems • polarization • optical coherence tomography • remineralization

Journal of Dental Research, Vol. 85, No. 9, 804-808 (2006)
DOI: 10.1177/154405910608500905
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