Color, translucency changes in resin-composite CAD/CAM blocks following staining solution immersion
Researchers have examined the changes in the color difference and translucency of resin-composite computer-aided design and computer-aided manufacturing blocks following the application of staining solutions.
In a study published in The Journal of the American Dental Association, the researchers prepared 250 rectangular specimens from four resin-based composites and a polymer-infiltrated ceramic network material. They then stored the specimens in one of five staining solutions: saliva, cola, black tea, coffee or red wine for periods of three, seven and 14 days. Following exposure to the solutions, the researchers performed toothbrushing on the blocks for four minutes per every 24 hours of immersion.
The researchers determined that several factors impacted color difference and translucency changes, including material, staining beverage as well as time interval and interactions between the factors. After an immersion period of 14 days, the researchers found that all of the materials — except for Lava Ultimate and Hyramic in red wine — demonstrated acceptable changes in color difference of 0.43 to 2.12, while all of the materials showed an acceptable reduction in translucency between -0.23 and -1.34.
Clinicians should consider patients’ dietary habits when selecting treatment materials.
Read more: JADA
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