Influência de diferentes meios de digitalização de radiografias na avalição de cáries proximais / Comparative performance of indirect digitized radiographs for detecting approximal caries

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

To evaluate the performance of conventional and indirect digital radiography and the effect of JPEG and TIFF file formats for detecting proximal surface caries. Fifty-six extracted teeth were mounted in blocks and radiographed with Insight conventional film. Films were digitized by two flatbed scanners (Canon CanonScan and Genius ColorScan) and four digital cameras (Canon Powershot G2, Canon Rebel XT, Nikon Coolpix 8700 and Nikon D70), in both JPEG and TIFF file formats. Three observers recorded the presence and depth of caries on 112 proximal surfaces for the conventional and digitized radiographs. They scored lesion presence in a 3-point confidence scale and depth on another 3-point scale. Radiographs were evaluated twice. The observers scores were compared with the results from a histological examination. Intra-observer agreement was moderate to good and interobserver agreement was fair to moderate. Sensitivities varied from 0.24 (Canon RebelXT/JPEG) to 0.53 (Convencional) and specificities from 0.93 (Nikon Coolpix/JPEG; Canon Powershot/TIFF; Canon RebelXT/JPEG e TIFF) to 0.97 (Escaner CanonScan/TIFF e JPEG). The accuracy varied from 0.82 (Canon RebelXT/JPEG) to 0.91 (Escaner CanonScan/JPEG). Images from CanonScan, both JPEG and TIFF, showed significant statistically differences compared with digital radiographs from the others devices and conventional film radiographs. File formats did not influences the detection of proximal caries. Digitizing conventional radiographs using the scanner CanonScan did not produce images of diagnostic quality.

ASSUNTO(S)

radiografia dentária dental radiography radiografia interproximal dental digital radiography radiografia dentária digital bitewing radiography

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