Dissolving Efficacy Of Solvents And Binary Compound On Gutta-Percha

To examine the efficacy of the binary compound, compared to individual solvents, on the dissolution of gutta-percha and epoxy resin-based sealer, together with the retreatment time. The solvents used in this study included orange oil, grapefruit oil, eucalyptol, tetrachloroethylene, grapefruit oil/tetrachloroethylene (1:1) and distill water (control). Gutta percha cones and epoxy resin-based sealer AH Plus were stored in moulds (n=42) and immersed in solvents for 5 and 20 min. Every mold was weighed before and after immersion. The time spent on the retreatment of mesial root canals in 35 extracted first maxillary molars with rotary files and different solvents was evaluated. The significance level was set at p < 0.05. There was a significant difference in dissolving efficacy between the control and test groups (p<0.05). For 20-minutes immersion time, tetrachloroethylene and grapefruit oil/tetrachloroethylene (1:1) displayed the best solvency capacity of gutta percha with weight losses of 11.2% and 10.8%, respectively, statistically different from that of orange oil and eucalyptol, with the smallest percentage of weight loss 3,23% and 1.35%. The binary compound presented the least time-consuming retreatment procedure than the individual solvents (p<0.05). The best solvency capacity of gutta percha was obtained with tetrachloroethylene while grapefruit oil showed a superior solvent effect of sealer. It was found that in order to reduce the retreatment time, it is necessary to use a binary solvent such as grapefruit oil/tetrachloroethylene (1:1).