الفهرس 
Title : The Effect of 3D Instrumentation versus Rotary Instrumentation on Postoperative Pain and Bacterial Reduction in Necrotic Oval Canals: A Randomized Clinical Trial
AbstractOnly 14 pages are availabe for public view
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Abstract
Aim: to evaluate the effect of instrumentation technique on postoperative pain and intracanal bacterial reduction in necrotic oval canals of mandibular premolars treated in a single visit with a randomized clinical trial. Methods: Sixty patients were included. After confirming the diagnosis clinically and radiographically, patients were randomly assigned into two equal groups. In the intervention group teeth were instrumented using XP-3D Shaper; while iRaCe conventional rotary files were used in the control group. Standard endodontic treatment was performed in single visit using 2.5% sodium hypochlorite for cleaning and lateral condensation technique with resin sealer for obturation. Pain was assessed using modified visual analogue scale (VAS) pre-operatively, then post-operatively after 6, 12 hours and daily for 5 days. Patients were given a placebo to be administrated in case of emergency and an analgesic (ibuprofen 400mg) was prescribed in case of persistent pain. The culture method was used to assess intracanal bacterial levels before and after instrumentation. Flare-up was considered if the patients reported moderate to severe pain and/or swelling that began 12 to 48 hours after treatment and lasted at least 48 hours. All demographic, baseline and outcome data were collected and statistically analyzed.Results: XP-3D Shaping caused a statistically significant decrease in the incidence of post-operative pain at 6, 12, and 24 hours, and in the severity of post-operative pain at 6, 12, 24, and 48 hours. The incidence of placebo intake was significantly higher in the conventional rotary shaping group. There was a significant decrease in the intracanal bacterial counts following instrumentation in both groups with no significant difference between them. The overall incidence of flare-up was 3.3%, which occurred only in the conventional rotary shaping group. Levels of post-operative pain on percussion were significantly lower in the intervention group