Evaluation of Staining-Dependent Colour Changes in Resin Composites Using Principal Component Analysis


Colour changes in Gradia Direct™ composite after immersion in tea, coffee, red wine, Coca-Cola, Colgate mouthwash, and distilled water were evaluated using principal component analysis (PCA) and the CIELAB colour coordinates. The reflection spectra of the composites were used as input data for the PCA. The output data (scores and loadings) provided… (More)
DOI: 10.1038/srep14638