الفهرس 
Assessment of Postoperative Pain After Using 2Shape and Protaper Next Rotary Systems in Patients With Symptomatic Pulpitis in Mandibular Molars: A Randomized Clinical Trial
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Abstract
Aim: To evaluate the effect of instrumentation technique on postoperative pain and incidence of analgesics intake in symptomatic pulpitis of mandibular molars treated in a single visit with a randomized clinical trial. Methods: Thirty patients complaining symptomatic pulpitis were included in the study. After confirming the diagnosis clinically and radiographically, patients were randomly assigned into two equal groups; group (I) molars were instrumented using 2Shape rotary system (intervention group); group (II) molars were instrumented using Protaper Next rotary system (control group).Standard endodontic treatment was performed in single visit using 2.5% sodium hypochlorite for cleaning and modified single cone technique with resin sealer for obturation.Pain was assessed using modified visual analogue scale (VAS) pre-operatively, then post-operatively after 6, 12, 24, 48 and 72 hours. An analgesic (ibuprofen 400mg) was prescribed to the patient in case of persistent pain. The incidence and /or number of analgesic tablets taken were recorded. The incidence of instrument separation during instrumentation was recorded in both intervention and control groups. All demographic, baseline and outcome data were collected and statistically analyzed.Results: No statistical significant difference was found between 2Shape and PTN groups regarding the incidence of pain at 6, 12, and 24 hours, and severity of post-operative pain at 6, 12, 24, 48 and, 72 hours.There was a decrease in the mean VAS score through the follow up periods in both groups. The incidence of analgesic intake was not significant in both groups. There was no statistical significant difference regarding incidence of instrument separation