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논문 기본 정보

자료유형
학술저널
저자정보
de Braganca Rafaella Mariana Fontes (Graduate Program in Dentistry Federal University of Sergipe Aracaju SE Brazil.) Moraes Rafael Ratto (Graduate Program in Dentistry Federal University of Pelotas Pelotas RS Brazil.) Faria-e-Silva Andre Luis (Department of Dentistry Federal University of Sergipe Aracaju SE Brazil.)
저널정보
대한치과보존학회 Restorative Dentistry and Endodontics Restorative Dentistry and Endodontics 제46권 제2호
발행연도
2021.1
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Objectives This study assessed the reliability of digital color measurements using images of resin composite specimens captured with a cellphone. Materials and Methods The reference color of cylindrical specimens built-up with the use of resin composite (shades A1, A2, A3, and A4) was measured with a portable spectrophotometer (CIELab). Images of the specimens were obtained individually or pairwise (compared shades in the same photograph) under standardized parameters. The color of the specimens was measured in the images using RGB system and converted to CIELab system using image processing software. Whiteness index (WID) and color differences (ΔE00) were calculated for each color measurement method. For the cellphone, the ΔE00 was calculated between the pairs of shades in separate images and in the same image. Data were analyzed using 2-way repeated-measures analysis of variance (α = 0.05). Linear regression models were used to predict the reference ΔE00 values of those calculated using color measured in the images. Results Images captured with the cellphone resulted in different WID values from the spectrophotometer only for shades A3 and A4. No difference to the reference ΔE00 was observed when individual images were used. In general, a similar ranking of ΔE00 among resin composite shades was observed for all methods. Stronger correlation coefficients with the reference ΔE00 were observed using individual than pairwise images. Conclusions This study showed that the use of cellphone images to measure the color difference seems to be a feasible alternative providing outcomes similar to those obtained with the spectrophotometer.

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