Micro-CT Evaluation of the Quality of Root Fillings When Using Three Root Filling Systems

Abstract

Aim To evaluate the percentage volumes of filling materials and voids in single-rooted teeth filled with three different filling systems using micro-computed tomography (micro-CT). Methodology Thirty single-rooted human teeth were used. After preparation of the root canals, the teeth were randomly divided into three groups (n - 10). The canals were filled with EndoREZ, ActiV GP or AH Plus/gutta-percha. Each specimen was scanned using a micro-CT device at a resolution of 13.68 mu m. Percentage volumes of root filling materials and voids were calculated and data were analysed statistically using the Kruskal-Wallis test and the Mann-Whitney U-test with Bonferroni adjustment. Within each group, the Friedman test was performed with the Wilcoxon signed-rank test to detect discrepancies. Results The percentage volume of filling material was significantly lower in the ActiV GP group than in the other groups (P < 0.05), whilst the percentage volume of voids was significantly higher in the ActiV GP group than in the other groups (P < 0.05). Conclusion None of the systems were associated with void-free root fillings. The ActiV GP system had a significantly higher percentage volume of voids than the other systems.