Avaliação in vitro do método de fluorescência laser no diagnóstico de lesões cariosas incipientes oclusais

• Ano de defesa: 2001
• Autor(a) principal: Santuza Maria Souza de Mendonca
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Minas Gerais
• Palavras-chave em Português: Fluorescência; Cáries dentárias; Clínicas dentárias; fluorescência laser; lesões cariosas; diagnóstico
• Link de acesso: https://hdl.handle.net/1843/ZMRO-8AZJPF

The objectives of the present study were to evaluate the validity and reproducibility, in vitro, of the laser fluorescence method (DIAGNOdent®) in incipient occlusal caries detection and to compare this method with the visual/radiographic, fluorescence with the Argon laser and agreement (visual/radiographic + DIAGNOdent®) methods. The sample used in this work was composed of 60 extracted permanent posterior human teeth without apparent cavitation on the occlusal surface. It was investigated if the saliva interfered in the diagnostic capacity of the fluorescence method with diode laser (DIAGNOdent®) and if the presence of stains on the teeth, brown or white, changed the results supplied by the exams that employed the fluorescence (diode and Argon). It was also verified if the agreement exam offered advantages over the visual/radiographic method in incipient occlusal caries detection. The reproducibility of the exams was calculated through the Kappa concordance test and the validity was asserted after confronting the results obtained with those supplied by the gold standard (stereomicroscope), when the sensibility, specificity, accuracy, positive and negative predictive values were calculated. The comparison among diagnostic validity of the several studied methods was performed through graphs similar to ROC curves. The reproducibility of visual/radiographic exam was considered great and that of the fluorescence exam with diode laser ranged from good (dry teeth) to great (teeth humidified with artificial saliva). The method that employs the diode laser did not seem to offer advantages over the visual/radiographic method and the agreement method demonstrated diagnostic capability similar to the visual/radiographic exam, contributing only to the identification of healthy sites. Saliva did not seem to interfere with the diagnostic capacity of the exam that employed DIAGNOdent® and the simultaneous presence, in the tooth, of brown pigmentation and white stains suggestive of fluorose can compromise the diagnostic capacity of the fluorescence method (DIAGNOdent®).