الفهرس 
Title : Comparison of Postoperative Pain after Root Canal Instrumentation Using M-Pro and ProTaper Next in Molars with Symptomatic Irreversible Pulpitis: A Randomized Clinical Trial
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Abstract
Aim: The aim of the present study was to clinically compare the incidence of postoperative pain after root canal preparation using M-pro rotary system (M-Pro®, Innovative Materials and Devices, Shanghai, China) and ProTaper Next rotary system (ProTaper Next®, Dentsply Tulsa Dental specialities, USA) in molars with symptomatic irreversible pulpitis. Methodology: 50 patients with symptomatic irreversible pulpitis in lower molars were included in the study. After clinical and radiographic examination, patients were assigned randomly into two groups (n=25). In the Intervention group, root canals were instrumented with M-Pro rotary files. In the control group, root canals were instrumented with ProTaper Next rotary files. Teeth were treated in a single visit and obturated using a modified single cone technique and AdSeal resin sealer. Pain was recorded as a primary outcome using NRS (Numerical Rating Scale) preoperatively and at 6, 12, 24, 48, and 72 hours postoperatively. Placebo tablets were given to the patients to be administered in the case of mild pain and an analgesic was prescribed in case of an emergency and patients were asked to record whether they had taken any placebo or analgesics and the number of analgesic tablets taken. All demographic data and NRS scores were collected from the patients and statistically analyzed. vii Results: Results showed no statistically significant difference between the 2 groups regarding the incidence and intensity of postoperative pain or analgesic intake at the different follow-up time intervals.There was a significant reduction in pain levels at all post-instrumentation follow up periods compared to preoperative pain level in both M-Pro and ProTaper Next groups