title: Postoperative pain after foraminal instrumentation with a reciprocating system and different irrigating solutions.
abstract: The aim of the present study was to evaluate and compare postoperative pain after foraminal instrumentation using 5.25% sodium hypochlorite (NaOCl) or 2% chlorhexidine (CHX) gel irrigation protocol in nonvital single-rooted teeth after reciprocating instrumentation. Sixty-two volunteers presenting a single root canal diagnosed with asymptomatic necrosis and apical periodontitis were randomized into 2 experimental groups regarding the irrigation protocol (ie, 5.25% NaOCl and 2% CHX gel groups). Endodontic treatment was performed in a single session under reciprocating instrumentation with foraminal instrumentation. Volunteers were instructed to record pain intensity. Scores from 1 to 4 were attributed to each kind of pain after 24, 48, and 72 h. Kolmogorov-Smirnov and Student´s t tests were used to determine significant differences at p<0.05. On average, the percentage of patients that had no or mild pain after 24, 48 or 72 h was 77.4%, 88.7% and 95.1%, respectively. No statistically significant age difference was found between the groups (p>0.05, Student´s t test). Postoperative pain showed no statistically significant difference at any observation period when using 5.25% NaOCl or 2% CHX gel (p>0.05). Moreover, no significant difference was observed in the mean number of analgesic tablets used between the groups (p>0.05). In conclusion, the use of 5.25% NaOCl or 2% CHX gel resulted in the same postoperative pain. Therefore, it can be inferred that irrigant choice has no relation with short-term follow up regarding postoperative pain.
authors.affiliation: Universidade Grande Rio, Duque de Caxias, RJ, Brasil.
authors.forename: Emmanuel João Nogueira Leal
authors.initials: EJ
authors.lastname: da Silva
authors.affiliation: Universidade Estadual de Campinas, Campinas, SP, Brasil.
authors.forename: Maria Rachel
authors.initials: MR
authors.lastname: Monteiro
authors.affiliation: Universidade Federal Fluminense, Niterói, RJ, Brasil.
authors.forename: Felipe Gonçalves
authors.initials: FG
authors.lastname: Belladonna
authors.affiliation: Universidade Estadual de Campinas, Campinas, SP, Brasil.
authors.forename: José Flávio
authors.initials: JF
authors.lastname: Almeida
authors.affiliation: Universidade Grande Rio, Duque de Caxias, RJ, Brasil.
authors.forename: Gustavo
authors.initials: G
authors.lastname: De-Deus
authors.affiliation: Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.
authors.forename: Aline de Almeida
authors.initials: Ade A
authors.lastname: Neves
mesh_terms: D002710:Chlorhexidine; D003762:Dental Instruments; D005260:Female; D006801:Humans; D008297:Male; D010149:Postoperative Pain; D012388:Root Canal Irrigants; D012973:Sodium Hypochlorite
chemical_list: D012388:Root Canal Irrigants; D012973:Sodium Hypochlorite; D002710:Chlorhexidine