Effect of protective coating on marginal integrity of nanohybrid composite during bleaching with carbamide peroxide: A microleakage study.
Loading...
Date
2015-03
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Aim: The aim of the study was to evaluate the microleakage on the marginal integrity of
nanohybrid composite during bleaching with carbamide peroxide after applying a protective
coating of G‑Coat plus (GC, Japan).
Materials and Methods: Class V cavities were prepared and restored with nanohybrid composite
restoration in 60 freshly extracted noncarious premolars extracted for orthodontic reasons.
Then they were divided into 3 groups. Group 1 ‑ bleaching with carbamide peroxide without
G coat plus (n = 20), Group 2 ‑ bleaching with carbamide peroxide with G‑Coat plus (n = 20),
Group 3 ‑ without bleaching procedure (n = 20) (control group). In Group 2, G coat plus was
applied over the restorative surface and margins. Then all teeth in Groups 1 and 2 were taken and
mounted in dental stone. Bleaching trays were custom fabricated over the cast with the help of
a heated vacuum‑forming machine. 10% carbamide peroxide (opalescence PF) was applied over
the tooth, and the bleaching process was done for about 2 weeks. Then all samples underwent
thermocycling and were then immersed in the 2% methylene blue solution for 24 h and observed
under a stereomicroscope to evaluate the amount of dye penetration. Data were compared using
Kruskal–Wallis test and Mann–Whitney test using SPSS Inc.; Chicago, IL, USA, Version 17.0.
Results: Mann–Whitney test shows that the difference in microleakage between Group 1–Group 2
and Group 2–Group 3 is statistically significant (P < 0.05).
Conclusion: Significant reduction in microleakage was seen in Group 2 when compared to
other groups.
Description
Keywords
Bleaching, G coat plus, microleakage, nanohybrid composite
Citation
Kumar Ashok A, Hariharavel VP, Narayanan Ashwin, Murali S. Effect of protective coating on marginal integrity of nanohybrid composite during bleaching with carbamide peroxide: A microleakage study. Indian Journal of Dental Research. 2015 Mar-Apr; 26(2): 167-169.