The frequency of sodium hypochlorite extrusion during root canal treatment: an observational clinical study

Background To determine the frequency of sodium hypochlorite (NaOCl) extrusion and evaluate the outcome of the injury. Methods A total of 1123 teeth indicated root canal treatment were included. An open‐ended needle was used during/after the instrumentation. Acute burning pain during irrigation was considered as NaOCl extrusion. Negative aspiration was applied for patients with extrusion, and appropriate treatment was planned due to the symptoms. The number of patients who experienced extrusion and symptoms were recorded. Analysis of variance (ANOVA), at P