Clove oil and supplementary irrigation techniques effectively removed parachloroaniline precipitate from root canal walls
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Abstract
Objectives: To compare paracholoaniline precipitate solubility of xylene, GP solvent, and clove oil and evaluate the remaining precipitate on root canal walls after irrigation with the most effective solvent combined with different supplementary irrigation techniques.
Materials and Methods: Thirty-four human mandibular premolars with single root canals were used. Fourteen-mm decoronated roots were instrumented and irrigated with NaOCl and EDTA. Specimens were irrigated with NaOCl and CHX to create paracholoaniline precipitate. Fifteen roots were divided into 3 organic solvent groups: xylene, GP solvent and clove oil. Two roots were irrigated with distilled water. Each root was split in half and mounted on customized-remountable silicone jig. Root canal wall images were captured via light microscopy, then rinsed with organic solvent and distilled water. Root pieces were remounted and post-solvent images were captured. Orange-brown precipitation area was evaluated. Data was recorded as initial and remaining precipitation area. Paracholoaniline precipitate solubility means were compared using Welch Anova followed by Games-Howell for multiple comparisons. Next, fifteen roots were divided into 3 irrigation technique groups: needle syringe, passive ultrasonic technique, and XP finisher file. Two roots were irrigated with distilled water. The most effective solvent, clove oil, was used. Roots were split, mounted and captured at coronal, middle and apical portion. Percentages of remaining precipitate median were compared using Kruskal-Wallis and Freidman tests. The significance level was set at 0.05.
Results: Clove oil, xylene and GP solvent demonstrated 99.6, 8.43, and 3.57% paracholoaniline precipitate solubility, respectively. Mean percentages were significantly different (p<0.05). Clove oil was the most effective solvent. When irrigating with different techniques, percentages of remaining precipitate were not significantly different (p>0.05).
Conclusion: Clove oil was the most effective solvent in dissolving paracholoaniline precipitate. Xylene and GP solvents have minimal solubility. Rinsing with clove oil using needle syringe dissolved the paracholoaniline comparable with other techniques.
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