Avaliação da acurácia dos métodos radiográficos convencional e digital direto na análise da extensão de lesões de cárie oclusais em molares decíduos. estudo in vitro / Accuracy evaluation of conventional and direct digital radiographic methods in the analysis of occlusal carious lesions extension in primary molars. An In Vitro Study

AUTOR(ES)

Paulo Renato Dias da Silva

DATA DE PUBLICAÇÃO

2008

RESUMO

This in vitro research, evaluated the accuracy of the direct digital radiographic method compared to the conventional radiographic method in the analysis of the extension of occlusal carious lesions in primary molars. The material was composed by 55 primary molars presenting pigmentation and, at least, one suspect site of occlusal carious lesion, these teeth had neither restoration nor surfaces with sealant. Digital radiographs were obtained with the Dixi3 system (Planmeca, Helsink, Finland) and the conventional radiographs with the Insight film (Kodak Eastman Co., USA), both in standard form and identical geometrical conditions. The images were evaluated individually by three radiologists, in ideal conditions for radiographic interpretation and with no access to the resources of imaging manipulation from the digital system. The results were rated according to the following criteria: 0 - absence of radiolucence in the enamel: 1 - radiolucence confined to the enamel, 2 - radiolucence in the enamel to the limit dentine-enamel, 3 - radiolucence in the enamel and in the half outer part of the dentine, 4 - radiolucence in the enamel reaching to the half inner part of the dentine. The gold standard was obtained by histological study. Data were compared by the Friedman`s test (P <= 0.05). The results obtained with the conventional radiographic films were similar to those obtained with both direct digital radiographs and gold standard; however, the results obtained with the digital radiographic system were significantly lower than those observed in the histological analysis. In the conditions of this study, it was concluded that the direct digital radiographic method significantly underestimate the extension of the occlusal caries lesions in primary molars.

ASSUNTO(S)

conventional radiography radiografia digital direta cárie dentária radiografia convencional direct digital radiography dente decíduo dental carie primary teeth

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