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Dye-enhanced laser fluorescence detection of caries lesions around brackets

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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 16 days. 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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Acknowledgments

The authors wish to thank the Fundação de Amparo à Pesquisa no Estado de São Paulo (FAPESP, Processo 2006/04102-9), the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, Processo 476372/2006-2) and Pró-Reitoria de Pesquisa da Universidade de São Paulo for financial support. The authors of this manuscript certify that they have no affiliation with or financial involvement in any organization or entity with a direct financial or personal interest in the subject matter or materials discussed in the manuscript.

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Authors and Affiliations

  1. Department of Pediatric Dentistry, Faculdade de Odontologia da Universidade de São Paulo, Av. Lineu Prestes, 2227, São Paulo, SP, 05508-000, Brazil

    Cássio José Fornazari Alencar, Mariana Minatel Braga & Fausto Medeiros Mendes

  2. Instituto de Química, Universidade de São Paulo, São Paulo, Brazil

    Elisabeth de Oliveira

  3. Oral Biology Research Center, Faculdade de Odontologia, Universidade de São Paulo, São Paulo, Brazil

    José Nicolau

Authors
  1. Cássio José Fornazari Alencar
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  2. Mariana Minatel Braga
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  3. Elisabeth de Oliveira
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  4. José Nicolau
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  5. Fausto Medeiros Mendes
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Correspondence to Fausto Medeiros Mendes.

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Alencar, C.J.F., Braga, M.M., de Oliveira, E. et al. Dye-enhanced laser fluorescence detection of caries lesions around brackets. Lasers Med Sci 24, 865–870 (2009). https://doi.org/10.1007/s10103-008-0572-0

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  • DOI: https://doi.org/10.1007/s10103-008-0572-0

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