Experimental investigation of demineralization and remineralization of human teeth using infrared photothermal radiometry and modulated luminescence

Raymond J. Jeon; Adam Hellen; Anna Matvienko; Andreas Mandelis; Stephen H. Abrams; Bennett T. Amaechi

doi:10.1117/12.763807

28 February 2008 Experimental investigation of demineralization and remineralization of human teeth using infrared photothermal radiometry and modulated luminescence

Raymond J. Jeon, Adam Hellen, Anna Matvienko, Andreas Mandelis, Stephen H. Abrams, Bennett T. Amaechi

Author Affiliations +

Proceedings Volume 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics; 68560B (2008) https://doi.org/10.1117/12.763807
Event: SPIE BiOS, 2008, San Jose, California, United States

Abstract

Photothermal radiometry (PTR) and modulated luminescence (LUM) were applied to detect and monitor the demineralization of root and enamel surfaces of human teeth to produce caries lesions and the subsequent remineralization of the produced lesions. The experimental set-up consisted of a semiconductor laser (659 nm, 120 mW), a mercury-cadmium-telluride IR detector for PTR, a photodiode for LUM, and two lock-in amplifiers. A lesion was created on a 1-mm × 4-mm rectangular window, spanning root to enamel surface, using an artificial caries lesion gel to demineralize the tooth surface and create small carious lesions. The samples were subsequently immersed in a remineralization solution. Each sample was examined with PTR/LUM on root and enamel before and after treatment at times from 1 to 10 days of demineralization and 2 to 10 days of remineralization. PTR/LUM signals showed gradual and consistent changes with treatment time. At the completion of the experiments, transverse micro-radiography (TMR) analysis was performed to correlate the PTR/LUM signals to depth of the carious lesions and mineral losses. In this study, TMR showed good correlation with PTR/LUM. It was also found that treatment duration did not correlate well to any technique, PTR/LUM, or TMR, which is indicative of significant variations in demineralization - remineralization rates among different teeth.

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Raymond J. Jeon, Adam Hellen, Anna Matvienko, Andreas Mandelis, Stephen H. Abrams, and Bennett T. Amaechi "Experimental investigation of demineralization and remineralization of human teeth using infrared photothermal radiometry and modulated luminescence", Proc. SPIE 6856, Photons Plus Ultrasound: Imaging and Sensing 2008: The Ninth Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-optics, 68560B (28 February 2008); https://doi.org/10.1117/12.763807

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