Does increasing the polymerization time have an effect on the coloring of composite resin restorations? / 60 Daily In-Vitro Work
Journal Title: International Journal of Medical Science and Innovative Research (IJMSIR) - Year 2018, Vol 3, Issue 11
Abstract
Objective: The aim of this study was to investigate the effect of increasing the polymerization time in composite resin materials on the coloration of composite resin restorations. Materials and Methods: In this study,40 pieces of 13 mm diameter and 1.5 mm thick composite blocks were used.Samples were subjected to 2 different polymerization times for 20 sec and 40 sec (n=20).Five different solutions (tea, coffee, cola, red wine and distilled water) were used for the staining procedure. Samples were examined by using spectrophotometer according to the time they were kept in solutions.Both polymerization time and solution differences were analyzed and the measurements were analyzed.The color values of each sample kept in solutions for 60 days were measured again on the 1st, 2nd, 7th, 21st, 30th and 60th days and the color change values (∆E00) were calculated.Statistical analyzes were performed by comparing the ANOVA in multiple groups with the Bonferonni test in paired comparisons, when the mean values of the data provided normal distribution.For nonparametric conditions Kruskall Wallis and Mann Whitney-U and before and after Wilcoxon sign tests were used. Results: The differences of the solutions for the same days of polymerization were examined and the only difference was obtained on the 7th day of the samples which were kept in the instant and the mean staining values of the samples which were polymerized for 40 seconds were statistically lower than the average value of the polymerized samples for 20 seconds (p=0.035).In all other cases, the coloration values of the polymerized samples for a period of 40 seconds were mostly less than the average but statistically significant difference could not be obtained (p>0.05). Conclusion: It was found that increasing the polymerization time of composite resin materials had no effect on coloration as long as it was made in accordance with the rules.
Authors and Affiliations
Hakan Yasin Gonder
Keywords
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