Comparison of Pain Intensity after Root Cannal Treatment Using Reciproc and Race Files in Necrotic Pulpitis

Root canal treatment could be associated with postoperative pain in patients. One of the leading causes of this pain is the extrusion of intracanal debris from the apical foramen during preparation and shaping. Among the common tools used in this regard are RaCe and Reciprocating files. Therefore, this study aimed to compare the intensity of postoperative pain using the mentioned systems.
This randomized clinical trial was conducted on 90 mandibular molars, who were divided into two 45-case groups. Following that, the samples were cleaned and shaped using RaCe and/or Reciproc files. Pain intensity was demonstrated using a visual analogue scale on 4th, 12th, 24th, 48th, and 72nd hours, as well as the first week after surgery, followed by the comparison of the results of study groups. Data analysis was performed using independent sample t-test, chi-square/Fisher’s exact test, and repeated measures. P-value of less than 0.05 was considered statistically significant.
In the RaCe group mean pain intensity at 4, 12, 24, 48, and 72 hours and the first week after surgery was 32.89, 25.71, 22.69, 17.36, 11.24, and 1.00, respectively. These values were 33.51, 31.36, 26.80, 24.02, 20.11, and 2.04, in the Reciproc group, respectively. Pain intensity at different times was significantly lower in the RaCe group, compared to the Reciproc group (with the exception of the fourth hour and first week after surgery) (P According to the results, use of Reciproc file during preparation and shaping of root canals in necrotized teeth was accompanied with less pain, compared to RaCe file. Therefore, it is recommended that this system be used in similar situations.