Abstract
OBJECTIVE: The purpose of this study was to evaluate the effect of finishing and polishing on color stability of a nanofilled composite resin (Filtek Z350 XT) according to different immersion media.MATERIAL AND METHOD: Composite disks (10 mm diameter, 2 mm thickness) were prepared for each group (n = 6) using a stainless steel mold. The groups were divided according to the presence or absence of finishing and polishing procedure and immersion media (artificial saliva, artificial juice- KAPO(r) Coca-Cola(r)flavors: pineapple, orange, strawberry and grape). The finishing and polishing procedures were performed using Super -Snap(r) disks. The specimens were stored in artificial saliva for 24 hours (baseline) and were analyzed using a color spectrophotometer by CIELab system. Then, they were immersed in different media for 5 minutes, 3 times a day, every 4 hours during 60 days. They were stored in artificial saliva at 37 ± 1°C during the immersion intervals. After this time, new measure of color was performed. The data were analyzed using Kruskall-Wallis test and Mann- Whitney test. The significance level was 5%.RESULT: The results showed that the finishing/polishing not significantly influence the color stability of resin composite (p > 0.05). There was no statistically significant difference in the color stability of the studied resin after immersion in different media (p > 0.05).CONCLUSION: The finishing and polishing procedures and the immersion media did not have influence on color stability of nanofilled resin Filtek Z350 XT.
Highlights
Among the direct restorative materials, composite resin is considered the material of choice whenever esthetic appearance is a concern[1]
With regard to the influence of extrinsic factors on color stability, factors related to patient behavior, such as poor oral hygiene and diet based on foods and beverages containing pigments; and those related to the dentist such as finishing and polishing procedures are highlighted[10,13,15,17]
The analysis of the results showed that the finishing / polishing does not have significant influence on the color stability of composite resin, considering the same immersion media
Summary
Among the direct restorative materials, composite resin is considered the material of choice whenever esthetic appearance is a concern[1]. Surface staining is a process that deserves attention since it leads to the esthetic failure of restoration and is considered one of the most frequent causes of limitation on their longevity[9] This process, which is due to a change in color stability of the composite, has a multifactorial etiology,[10,11,12,13] involving intrinsic[10,14] and extrinsic factors[6,14,15,16]. The aim of the present study was to observe the effect of finishing and polishing on color stability of composite resin, considering its immersion in artificial juices with different flavors
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