Effect of the polishing procedures on color stability and surface roughness of composite resins

Abstract

Objectives. To evaluate the polishing procedures effect on color stability and surface roughness of composite resins. Methods. Specimens were distributed into 6 groups: G1: Filtek Supreme XT + PoGo; G2: Filtek Supreme XT + Sof-Lex; G3: Filtek Supreme XT + no polishing; G4: Amelogen + PoGo; G5: Amelogen + Sof-Lex.; G6: Amelogen + no polishing. Initial color values were evaluated using the CIELab scale. After polishing, surface roughness was evaluated and the specimens were stored in coffee solution at 37°C for 7 days. The final color measurement and roughness were determined. Results. Sof-Lex resulted in lower staining. Amelogen showed the highest roughness values than Filtek Supreme on baseline and final evaluations regardless of the polishing technique. Filtek Supreme polished with PoGo showed the lowest roughness values. All groups presented discoloration after storage in coffee solution, regardless of the polishing technique. Conclusion. Multiple-step polishing technique provided lower degree of discoloration for both composite resins. The final surface texture is material and technique dependent.

Figure 1

Average and standard deviation values concerning Delta E regarding composite resins (Filtek Supreme (FS) and Amelogen (AM), polishing procedures and coffee storage time (baseline and 7-days storage)). Different small letters mean statistically significant difference between resin composites (P > 0.05); different capital letters mean statistically significant difference between polishing procedures (P > 0.05).

Figure 2

Average values between baseline and final evaluation of surface roughness concerning polishing procedures and composite resins. Different small letters mean statistically significant difference between resin composites (P > 0.05); different capital letters mean statistically significant difference between polishing procedures (P > 0.05).