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Evaluation of the Influence of the type of Irrigating Solutions in Postoperative Pain and Regression of Perirradicular Injury in Teeth Obtained in Single Session and Single Cone – Clinical Case Study

Endodontic treatment aims at the chemical and mechanical preparation of a dental element that has inflammation or pulp necrosis. During endodontic intervention, postoperative pain may develop, as well as difficulty in the regression of the periradicular lesion. Given the context, the present work is a clinical case report with the objective of evaluating whether the type of irrigating solution used in the endodontic treatment of filled teeth in a single session and single cone influences the postoperative symptomatology and regression of the periradicular lesion. This is a clinical, exploratory, qualitative and descriptive case study, where 2 patients were treated. They were divided into two groups: G1 (n:01) (irrigation with 2.5% sodium hypochlorite) and G2 (n:01) (irrigation with 2% chlorhexidine gel and saline). All dental elements were anesthetized, access surgeries were performed, initial exploration with K file # 10 or 15 was performed until the apparent length of the tooth. Instrumentation technique was performed with hand files and confirmation of working length through Root foraminal locator. Final irrigation was performed with 3 ml of 17% EDTA. The canals were dried with capillary tips, attached to a high-power suction device and with absorbent paper cones and filled, in the same session, by the Tagger Hybrid technique and restored with composite resin. Patients were followed for a period of 24h, 48h, 2, 3 and 6 months for postoperative pain assessment and periradicular lesion regression. Through the results obtained, it was noted that although both irrigating solutions are effective, it was observed that 2.5% sodium hypochlorite caused grade 3 pain according to the patient's pain scale during the first 24 hours, compared with 2% chlorhexidine gel, which had no painful symptoms at any time after completion of treatment and follow-up. In conclusion, in this study, 2.5% sodium hypochlorite may cause more postoperative pain compared to 2% chlorhexidine gel, but there was no significant difference in pain levels between the groups.