The Effect of Smoking and Brushing on the Color Stability and Stainability of Different CAD/CAM Restorative Materials

Author(s)

Schelkopf, Stuart ; Dini, Caroline ; Beline, Thamara ; Wee, Alvin G. ; Barao, Valentim A. R. ; Sukotjo, Cortino ; Yuan, Judy Chia-Chun

• Document type: Journal article
• Source: MATERIALS; v. 15, n. 19, p. 13-pg., 2022-10-01.

Abstract

This study aimed to investigate and compare the color stability and stainability of computer-aided design/computer-aided manufacturing (CAD/CAM) restorative materials in their glazed (G) and polished (P) state when exposed to cigarette smoke, as well as after brushing. Three CAD/CAM restorative materials were investigated: lithium disilicate CAD (LD), zirconia (Zr), and Telio PMMA CAD (PMMA), according to their surface finishing and assignment to cigarette smoking exposure or soaking in the saliva (control) group. The color change ( increment E) was calculated before and after the intervention performed for all specimens, using the L*a*b values to quantitatively assess the shade differences. Statistical analysis was performed using one-way repeated measures ANOVA and Bonferroni multiple comparison analysis (alpha = 0.05). The surface finishing did not influence the materials' stainability. Color change was noted after smoking, LD and Zr-G and Zr-P had a comparable color change (p > 0.05), while PMMA presented lower increment E values (p < 0.05). After brushing, all specimens had a significant color change that was high for LD-G and LD-P, and Zr-G, compared with Zr-P and PMMA (p < 0.05). In conclusion, the exposure to cigarette smoke showed that LD, Zr, and PMMA are all susceptible to staining, but brushing decreases surface staining. (AU)

• FAPESP's process: 20/05231-4 - Development of a new thermosensitive hydrogel for controlled release of drugs to prevent and treat peri-implant inflammations
• Grantee: Valentim Adelino Ricardo Barão
• Support Opportunities: Regular Research Grants
• FAPESP's process: 20/05234-3 - Development of a new thermosensitive hydrogel for controlled drug release aimed at preventing and treating peri-implant inflammations
• Grantee: Caroline Dini
• Support Opportunities: Scholarships in Brazil - Doctorate