Statistical analysis
pain
Statistical analyses were performed using SPSS 25. Means and standard deviations of pain intensity scores (VAS from 0 to 10) of patients in NaOCl groups with different concentrations and temperatures were calculated and reported before treatment, immediately after treatment, 3, 24, 48, and 72 h after treatment, and 7 days after treatment. Also, the median and the first and third quartiles of patients' pain scores after analgesia, and the number of analgesics used by patients in NaOCl groups and at different time intervals after treatment were calculated and reported. Due to the normal distribution of VAS pain data, the comparison of changes in pain severity scores in different groups over time was performed by repeated‐measures analysis of variance. Due to the nature of pain score rankings and the number of analgesics used, intergroup comparisons of these variables at each time interval were performed by the Kruskal–Wallis test, and their intragroup comparisons at different times were performed by the Friedman test. Bonferroni tests were used to show the differences between every two‐time points.