Article

Dye-enhanced laser fluorescence detection of caries lesions around brackets

Lasers in Medical Science (Impact Factor: 2.42). 11/2009; 24(6):865-870. DOI: 10.1007/s10103-008-0572-0

ABSTRACT The aim was to evaluate the performance of DIAGNOdent [laser fluorescence(LF) and LFpen] devices enhanced by fluorescent dye
in detecting mineral loss around brackets and comparing the inhibitory effect of bonding material on artificial demineralization,
and to verify whether LF methods show the same trends of mineral loss. Brackets were bonded to premolar halves with Fuji Ortho
LC, Transbond XT, and Ortho Glass LC cements (n = 15). The teeth were soaked in demineralizing solution (pH = 4.8) for 16days. Mineral loss was calculated by atomic emission
spectrometry, and lesions were measured with LF devices with dye [tetrakis N-methylpyridyl porphyrin (TMPyP)]. Groups were compared with regard to LF readings and mineral loss, and performance of caries
detection was calculated. Higher mineral loss and LF-TMPyP values occurred in the resin group. LFpen-TMPyP readings were significantly
higher in the demineralized groups. Correlation was observed between mineral loss and LF measurements. LF methods are capable
of identifying lower demineralization around brackets bonded with resin-modified glass ionomer cements.

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