Abstract
Objective: The inconsistency between resin brands and the VITA shade guide prevents accurate shade matching in restorations, leading to aesthetic failure. The aim of this study was to evaluate the delta E of five groups of resins produced using the additive 3D printing technique with the VITA shade guide and the natural tooth. Methods: Two hundred hybrid resins samples were produced and divided into five groups of 40 according to the following brands: FREEPRINT® Crown, Saremco Print Crowntec, VarseoSmile TriniQ, VarseoSmile® Crownplus and V-print C&B Temp, using an 3D printer. All the samples were washed, light-cured, and polished. The samples were photographed, and the L∗a∗b values were recorded using the eLAB_prime software. After, the delta E value between the VITA shade guide samples and the natural tooth samples was calculated. The data was analysed using SPSS software and compared using parametric tests. Results: There were significant differences between the VITA shade guide and natural tooth samples. For the VITA shade guide, the FREEPRINT® Crown resin had the lowest delta E, followed by Saremco® print CROWNTEC, VarseoSmile® TriniQ®, and finally VarseoSmile® Crownplus, which was similar to V-Print C&B Temp. For the natural tooth, VarseoSmile® TriniQ® had a lower delta E, followed by VarseoSmile® Crownplus, Saremco® print CROWNTEC, FREEPRINT® Crown, and V-Print C&B Temp. Conclusion: For the VITA shade guide, the FREEPRINT® Crown resin had the lowest delta E and for the natural tooth VarseoSmile® TriniQ® had a lower delta E, showing greater proximity to the tooth's natural colour.