Evaluation of the Effectiveness of Different Endodontic Treatment Techniques in Postoperative Symptoms, Apical Repair, Longevity of Rehabilitations, and Oral Health-related Quality of Life

Objective: The objective of this study will be to evaluate the effectiveness of different endodontic treatment techniques in postoperative symptoms, apical repair, longevity of rehabilitations, and oral health-related quality of life. Methods: This prospective, randomized, double-blind clinical study was approved at the Research Ethics Committee (nº 2.353.996) and will consist of a sample of 350 patients who will be attended in the clinics of the Federal University of Fluminense/Institute of Health of Nova Friburgo (UFF/ISNF), in which they will be selected based on eligibility criteria. Patients aged up to 18 years, with teeth with necrotic pulps and radiographic evidence of periapical lesion will be included. These patients will be randomly divided into 8 groups: I (35 patients): unirradicular teeth will be submitted to endodontic treatment with foraminal enlargement, instrumentation with reciprocating rotation, sodium hypochlorite as irrigant, lateral condensation filling with MTA Fillapex; II (35 patients): unirradicular teeth will be submitted to endodontic treatment with foraminal enlargement, instrumentation with reciprocating rotation, sodium hypochlorite as irrigant, photobiomodulation (aPDT and LLLT), lateral condensation filling with MTA Fillapex; III (35 patients): unirradicular teeth will be submitted to endodontic treatment with foraminal enlargement, instrumentation with reciprocating rotation, chlorhexidine as irrigant, lateral condensation filling with MTA fillapex; IV (35 patients): unirradicular teeth will be submitted to endodontic treatment with foraminal enlargement, instrumentation with reciprocating rotation, sodium hypochlorite as irrigant, lateral condensation filling with AH Plus; V (35 patients): unirradicular teeth will be submitted to endodontic treatment with foraminal enlargement, instrumentation with reciprocating rotation, sodium hypochlorite as irrigant, cryotherapy with saline solution, lateral condensation filling with MTA Fillapex; VI (35 patients): unirradicular teeth will be submitted to endodontic treatment with foraminal enlargement, instrumentation with reciprocating rotation, sodium hypochlorite as irrigant, cryotherapy with saline solution, lateral condensation filling with AH Plus; VII (35 patients): unirradicular teeth will be submitted to endodontic treatment with foraminal enlargement, instrumentation with reciprocating rotation, sodium hypochlorite as irrigant, ozone therapy, lateral condensation filling with MTA Fillapex; VIII (35 patients): unirradicular teeth will be submitted to endodontic treatment with foraminal enlargement, instrumentation with reciprocating rotation, sodium hypochlorite as irrigant, ozone therapy, lateral condensation filling with AH Plus; IX (35 patients): molars will be submitted to endodontic treatment with foraminal enlargement, instrumentation with reciprocating rotation, conventional irrigation with sodium hypochlorite, lateral condensation filling with MTA fillapex; X (35 patients): molars will be submitted to endodontic treatment with foraminal enlargement, instrumentation with reciprocating rotation, passive ultrasonic irrigation with sodium hypochlorite, lateral condensation filling with MTA fillapex. The analysis of the postoperative symptoms will be performed by the visual analog pain scale at 1th, 2th, 3th, 4th, 5th, 6th, 7th, 14th and 30th days and by the clinical evaluation of edema in 48 and 72 hours. The periapical lesion repair will be evaluated clinically and radiographically at 3, 6, 12, 18 and 24 months. The longevity of rehabilitations will be performed clinically and radiographically for 24 months. In addition, patients will respond a quality of life questionnaire (OHIP-14) on the day of endodontic treatment, on the 7th day and on the 30th day. Data analysis: The data will be inserted into a statistical program (SPSS), obtaining the frequencies of the characterization variables of the sample. The appropriate tests will be used to compare the means of the groups.