Department of Prosthetic Dentistry, UKR University Hospital Regensburg, 93042, Regensburg, Germany.
Clin Oral Investig. 2022 May;26(5):4183-4194. doi: 10.1007/s00784-022-04391-3. Epub 2022 Feb 4.
The aim was to investigate color, gloss, or roughness of splint materials after storage in liquids and toothbrush simulation.
A total of 58 × 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; CM-3500d, Konica-Minolta), gloss (ISO 2813:2014), and roughness values were determined (3D laser-scanning-microscope, KJ 3D, Keyence) before and after simulation or storage.
Levene-test, one-way ANOVA, Bonferroni post hoc test, between-subjects effects, Pearson correlation (α = 0.05).
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 (ΔE material (η2 = 0.239/p < 0.001), storage time (η2 = 0.179/p < 0.001); gloss (η2 = 0.751/p < 0.001) (η2 = 0.401/p < 0.001); Ra/Rz (η2 ≥ 0.801/p < 0.001) (η2 ≥ 0.416/p < 0.001)). Correlations were found between Rz and Ra (Pearson 0.887/p ≤ 0.001) or Rz and ΔE (0.517/p ≤ 0.001) or Ra and ΔE (0.460/p ≤ 0.001).
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.
Milled and 3D printed splints show good color, gloss, and roughness resistance after 4-week storage or toothbrush application.
研究在液体和牙刷模拟储存后，夹板材料的颜色、光泽或粗糙度。
共制作了 58×8 个试件（n=每种材料和组 10 个）；在空气、水、咖啡、红酒和清洁片存储后进行制作、24 小时、两周和四周储存或牙刷处理；使用 ISO 11664-4:2008;CM-3500d,Konica-Minolta 进行颜色值（L*、a*、b*）、光泽（ISO 2813:2014）和粗糙度值（3D 激光扫描显微镜，KJ 3D，Keyence）的测定。
Levene 检验、单向方差分析、Bonferroni 事后检验、组间效应、Pearson 相关（α=0.05）。
由于接触染色溶液/牙刷模拟，颜色、光泽和粗糙度发生了变化。对颜色、光泽和粗糙度影响最大的是材料，其次是储存时间（材料的 ΔE（η2=0.239/p<0.001），储存时间（η2=0.179/p<0.001）；光泽（η2=0.751/p<0.001）（η2=0.401/p<0.001）；Ra/Rz（η2≥0.801/p<0.001）（η2≥0.416/p<0.001））。在 Rz 和 Ra 之间（Pearson 0.887/p≤0.001）或 Rz 和 ΔE（0.517/p≤0.001）或 Ra 和 ΔE（0.460/p≤0.001）之间发现了相关性。
储存和刷牙伴随着颜色、光泽和粗糙度的变化。经过 4 周储存后，几乎所有材料都出现了明显的变色。随着储存时间的增加，光泽值降低。初始粗糙度和抛光性随着材料硬度的增加而提高。
铣削和 3D 打印夹板在 4 周储存或牙刷应用后表现出良好的颜色、光泽和耐粗糙度性。
