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- Title
Discoloration of fiber-reinforced composite resin disc for computer-aided design/computer-aided manufacturing after immersion in coffee and curry solutions.
- Authors
Maho SHIOZAWA; Yumi TSUCHIDA; Tetsuya SUZUKI; Hidekazu TAKAHASHI
- Abstract
The purpose of this study was to clarify the discoloration of fiber-reinforced composite resin (FRC) disc materials. The color differences (ΔEs) of three CAD/CAM disc materials, FRC with different fiber orientations, composite resin, and polyether-ether-ketones were evaluated after month-long immersion in water, coffee, and curry. The ΔEs of all materials after coffee and curry immersion increased with increasing immersion periods, while those after water immersion barely increased. FRC exhibited a smaller color difference and water sorption value than composite resin and a greater color difference and water sorption value than polyether-ether-ketones. The ΔEs after coffee immersion were significantly correlated with the water sorption value. The ∆E of FRC with fiber orientations perpendicular to the surface was greater than that of FRC with fiber orientations parallel to the surface, likely due to greater exposure of the matrix-fiber interface. This result suggested that the fiber orientations of FRC affected the discoloration.
- Subjects
FIBROUS composites; CAD/CAM systems; DISCOLORATION; FIBER orientation; WATER immersion
- Publication
Dental Materials Journal, 2023, Vol 42, Issue 1, p64
- ISSN
0287-4547
- Publication type
Article
- DOI
10.4012/dmj.2022-121