title: In vitro study of effect of solvent on root canal retreatment.
abstract: The aim of this study was to assess the effectiveness of five different solvents: xylol, eucalyptol, halothane, chloroform and orange oil on softening gutta-percha in simulated root canals. One drop of solvent was placed into a reservoir made in a simulated canal whose channel was previously instrumented and filled with gutta-percha and N-Rickert sealer. After 5 min, softening was evaluated for each solvent by the penetration of a spreader while applying force with a 442 Instron apparatus to reach a depth of 5 mm. The results were analyzed statistically by the Kruskal-Wallis test. Xylol and orange oil were better in softening gutta-percha than the other solvents. There was no significant difference between xylol and orange oil, but these were statistically different from eucalyptol, halothane and chloroform (p < 0.01).
authors.affiliation: Discipline of Endodontics, Faculty of Dentistry, USP, São Paulo, SP, Brazil.
authors.forename: Kazumi Onaga Nagayama
authors.initials: KO
authors.lastname: Oyama
authors.forename: Evandro Luiz
authors.initials: EL
authors.lastname: Siqueira
authors.forename: Marcelo dos
authors.initials: Md
authors.lastname: Santos
mesh_terms: D002725:Chloroform; D003511:Cyclohexanols; D000077591:Eucalyptol; D006171:Gutta-Percha; D006221:Halothane; D039821:Monoterpenes; D010938:Plant Oils; D019233:Retreatment; D012387:Root Canal Filling Materials; D018915:Root Canal Preparation / Q000379:methods*; D012997:Solvents; D018709:Statistics, Nonparametric; D013729:Terpenes; D014992:Xylenes
chemical_list: D003511:Cyclohexanols; D039821:Monoterpenes; C080618:N-Rickert sealer; D010938:Plant Oils; D012387:Root Canal Filling Materials; D012997:Solvents; D013729:Terpenes; D014992:Xylenes; D002725:Chloroform; D006171:Gutta-Percha; D000077591:Eucalyptol; D006221:Halothane