Evaluation of chemical substances used as solvents in endodontic retreatment

Carlos Alberto Herrero de Morais, Marcos Sérgio Endo, Marcelo Capitânio, Marco Antonio Húngaro Duarte, Alfredo Franco Queiroz

Introduction: The solvent power of chemicals used in endodontic retreatment is an important property related to the quality of filling material removal. Objective: To compare the solvent power of five substances used in endodontic retreatment after contact with gutta-percha. Methods: A total of 18 gutta-percha cones (#80), weighed on a precision analytical scale and divided into six groups were used: I) chloroform; II) eucalyptol; III) xylol; IV) halothane; V) d’limonene; VI) saline solution (negative control). The cones were immersed in 5 mL of each substance tested inside closed amber glass, and kept in contact at 37 °C for 15 minutes. After this period, 5 mL of saline solution was added to each vial shaken manually for five seconds. Cones were then filtered through absorbent paper. Fragments remained at room temperature for 48 hours, then removed from the filters and reweighed. Data were tested by ANOVA and Kruskal-Wallis test (p = 0.05) was applied to compare the groups. Results: Chloroform (0.04383 ± 0.01831) showed higher solvent power, followed by d’limonene (0.0608 ± 0.01103), xylol (0.06227 ± 0.004015), halothane (0.0653 ± 0.005373) and, finally, eucalyptol (0.0699 ± 0.0006083). Only the chloroform group was significantly different from the control group (p = 0.0431). Conclusion: None of the solvent solutions have completely dissolved gutta-percha, but all promoted its plastification.

Keywords: Retreatment. Solvent solutions. Gutta-percha.

How to cite: Morais CAH, Endo MS, Capitânio M, Duarte MAH, Queiroz AF. Evaluation of chemical substances used as solvents in endodontic retreatment. Dental Press Endod. 2017 Sept-Dec;7(3):62-5. DOI: https://doi.org/10.14436/2358-2545.7.3.062-065.oar

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