Dye-enhanced laser fluorescence detection of caries lesions around brackets.
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.
Department of Pediatric Dentistry, Faculdade de Odontologia da Universidade de São Paulo, São Paulo, SP, Brazil.
Cássio José Fornazari
CJ
Alencar
Mariana Minatel
MM
Braga
Elisabeth
E
de Oliveira
José
J
Nicolau
Fausto Medeiros
FM
Mendes
D003731:Dental Caries / Q000175:diagnosis* / Q000209:etiology* / Q000517:prevention & control; D003738:Dental Cements; D005456:Fluorescent Dyes; D005899:Glass Ionomer Cements; D006801:Humans; D066298:In Vitro Techniques; D007834:Lasers; D016910:Orthodontic Brackets / Q000009:adverse effects*; D011166:Porphyrins; D017001:Tooth Demineralization / Q000175:diagnosis / Q000209:etiology / Q000517:prevention & control
D003738:Dental Cements; D005456:Fluorescent Dyes; D005899:Glass Ionomer Cements; D011166:Porphyrins; C540459:meso-tetrakis(N-methylpyridinium-4-yl)porphyrin