Color stability, surface roughness and flexural strength of additively manufactured and milled interim restorative materials after aging

Do Polishing Methods and Colorant Beverages Affect the Color Stainability of 3D-printed Permanent Restorations?

“…Although Vita Easyshade V is designed for in-vivo color measurements, it has also been used for in-vitro measurements in many studies and its accuracy and reliability have been demonstrated. 8,13,15,22,23 CIELAB color difference formula (ΔE) has been used to evaluate color changes in dental restorative materials. However, in the last decade, researchers have been reporting color changes using the CIEDE2000 color change formula (ΔE 00 ), which has been proven to be more accurate in the visual perception of color change.…”

“…A single researcher recorded the color coordinates of each sample on a black background with a 2-degree observation angle in the center of samples under D65-led illumination. 13 Measurements were repeated three times for each specimen. The mean of three measurements was recorded as L, a, and b coordinates of the sample.…”

“…[7][8][9][10][11] The 3D printer technology, low polymerization rate, and water sorption of 3D-printable resins can explain higher color stainability. 10,12 Previous studies 4,10,13 have reported different results regarding the effect of 3D-printing technology on the discoloration of 3D-printable resins. While a previous study stated that 3D-printing technology did not affect the discoloration of 3D-printable resins when the samples were subjected to 5000 thermal cycles in distilled water, other previous studies determined the effect of 3D-printing technology on the discoloration of the 3D-printable resins when the samples immersed for 30 days in distilled water.…”

Influence of Post-Curing in Nitrogen-Saturated Condition on the Degree of Conversion and Color Stability of 3D-Printed Resin Crowns

“…The discoloration agents were selected based on previous studies that studied the color stability of prostheses made using computer-aided design and computer-aided manufacturing (CAD/CAM), and the crown specimens of each group were divided into four subgroups according to the discoloration agents that they were added to, as follows: distilled water, coffee, wine, and curry ( Figure 2 ) [ 3 , 4 , 5 , 7 , 8 , 9 ]. Coffee was made using Nescafe Crema Americano (Nestle; Vevey, Switzerland) according to the manufacturer’s instructions (3 g of pre-ground powder mixed with 300 mL of distilled water).…”

“…Most 3D printers use resin compounds to form specific configurations that meet the purpose of restoration [ 2 ]. Although their ability to be shaped into proper configurations and their integrity against functional and occlusal force are suitable for clinical use in dental fields, resin compounds are susceptible to discoloration due to their composition and chemical structures [ 3 , 4 , 5 , 6 ].…”