Akademik Veri Yönetim Sistemi
Çukurova University Faculty of Dentistry 2nd International Dental Congress on Additive Manufacturing (IDCAM 2024), Adana, Türkiye, 30 Mayıs - 01 Haziran 2024, ss.26
Background. The aim of this study was to compare three-dimensional (3D) printed resins with CAD/CAM
milled and composite resins and to evaluate the effect of surface polishing on surface roughness and color change.
Methods. A total of 90 specimens with a size of 6×6×2 mm were prepared with different production meth- ods using 3D printing permanent resin Saremco print Crowntech (Saremco, Switzerland), CAD/CAM milling block Shofu Blok HC (Shofu, Japan) and permanent composite resin Charisma Smart (Kulzer, Germany) (n=30). After the surfaces were sanded with 600, 800, 1000 grit SiC sandpaper, the sample from each group was randomly divided into 3 groups according to the polishing procedure to be applied: G1: Control, G2: Polish paste and felt G:3 Twist bur. After polishing, each sample group was divided into 2 subgroups (n=5) and stored at 37 C for 1
day and 7 days in different solutions: distilled water and coffee. Surface roughness values were measured using a tactile profilometer (Surftest SJ 201, Mitutoyo, Tokyo, Japan) before-after polishing, and on the 1st and 7th day after soaking in solutions. All color measurements were taken before and after each storage period using a clinical spectrophotometer (Vita Easyshade V) according to the CIE (L*a*b*) system and color differences were calculated using CIEDE2000 (ΔE00). Statistical analyses were performed using one-way ANOVA, Tukey post-hoc test and independent t-test and significance level was set at p ≤ 0.05.
Results. According to the data obtained, 3D printing resin and composite resin groups were found to be statistically significantly higher than CAD/CAM milling block groups in terms of both surface roughness and color change after soaking in coffee in both storage periods (p ≤ 0.05). The control groups (G1), which were not polished in 3D printing resin and composite resin groups, showed the highest roughness and color change values.
Conclusion. By polishing permanent restorations fabricated with 3D printed resin using polishing pastes or rubbers, both surface roughness and coloration of the restorations can be reduced clinically.
Key word. 3D permanent resin, polishing, surface roughness, discoloration