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Color changes according to post-curing time of 3D printed resins relative to the control group without post-curing. No noticeable color change was observed until 15 and 30 min, while ΔE00 values of ≥2.25 were observed for Nextdent C&B and DIOnavi C&B resins after 60 min. Data are mean and standard-deviation values. Asterisk shows a statistically significant difference compared with the color change of the 15 min of post-curing specimens.
