Hickl, Verena and Strasser, Thomas and Schmid, Alois and Rosentritt, Martin (2022) Effects of storage and toothbrush simulation on color, gloss, and roughness of CAD/CAM, hand-cast, thermoforming, and 3D-printed splint materials. CLINICAL ORAL INVESTIGATIONS, 26 (5). pp. 4183-4194. ISSN 1432-6981, 1436-3771
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Objectives The aim was to investigate color, gloss, or roughness of splint materials after storage in liquids and toothbrush simulation. Materials and methods A total of 58 x 8 (n =10 per material and group) specimens were fabricated (hand-cast, thermoforming, CAD/CAM-milled, 3D-printed materials); stored in air, water, coffee, red wine, and cleaning tablets; and investigated after fabrication, 24 h, two-, and four-week storage or toothbrushing. Color values (L*, a*, b*; ISO 11664-4:2008; CM3500d, Konica-Minolta), gloss (ISO 2813:2014), and roughness values were determined (3D laser-scanning-microscope, KJ 3D, Keyence) before and after simulation or storage. Statistics: Levene-test, one-way ANOVA, Bonferroni post hoc test, between-subjects effects, Pearson correlation (alpha = 0.05). Results Color, gloss, and roughness altered due to contact with staining solutions/toothbrush simulation. Highest impact on color, gloss, and roughness presented the material followed by storage time (Delta E material (eta 2 = 0.239/p < 0.001), storage time (eta 2 = 0.179/p < 0.001); gloss (eta 2 = 0.751/p < 0.001) (eta 2 = 0.401/p < 0.001); Ra/Rz (eta 2 >= 0.801/p < 0.001) (eta 2 >= 0.416/p <0.001)). Correlations were found between Rz and Ra (Pearson 0.887/p <= 0.001) or Rz and Delta E (0.517/p <= 0.001) or Ra and Delta E (0.460/p <= 0.001). Conclusions Storage and toothbrushing were accompanied by a change in color, gloss, and roughness. Almost all materials showed visible discoloration after 4 weeks of storage. Gloss values decreased as storage time increased. The initial roughness and polishability were better with harder materials.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SURFACE-ROUGHNESS; TEMPORARY RESTORATIONS; DENTAL MATERIALS; RESIN COMPOSITE; STABILITY; HARDNESS; ABRASION; TIME; DISCOLORATION; DEGRADATION; Storage; Toothbrushing; Splints |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Zahnärztliche Prothetik |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Nov 2023 08:09 |
| Last Modified: | 27 Nov 2023 08:09 |
| URI: | https://pred.uni-regensburg.de/id/eprint/56812 |
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