Removal of calcium hydroxide from the root canal with manual, sonic and ultrasonic irrigation

Abstract

Introduction: It is essential to completely remove calcium hydroxide prior to root canal filling, in vitro studies have shown that its retentiveness in the ducts prevents the penetration of sealants in the dentinal tubules. Objective: to determine the effectiveness of the elimination of calcium hydroxide medication from the root canal of teeth using different irrigation systems. Methodology: 148 straight root canals of human teeth were prepared using files for irrigating with sodium hypochlorite. The root canals were filled using Ca (OH) 2 mixed with black ink to facilitate viewing under the microscope. The teeth were divided into 5 groups according to the elimination protocol. In each of the groups, the apical extrusion was measured during the irrigation stage by the Huang X method, after removal of Ca (OH) 2, they were sectioned longitudinally and then on a slide the samples were observed. Finally, the contents were analyzed to quantify the degree of extrusion caused during the clinical procedure. Tha ANOVA was used to statistical anlysis.Results: There were significant differences between groups 1-2, 1-3, 1-4 and 1-5. The average remanence was higher (66.4%). Groups 2 (41.6%) and 5 (34.8%) obtained greater removal efficiency. ANOVA (α = 0.05) determines that there are no significant differences between the 5 groups. Conclusions: Ultrasonic activation devices showed a greater elimination of calcium hydroxide medication from dentinal walls to manual techniques, however it proved to be a more invasive therapy due to a greater extrusion of detritus.

Keywords

• hidróxido de calcio
• irrigación terapéutica
• endodoncia