Abstract

BOURREAU, Marcelle Louise Sposito; SOARES, Adriana de Jesus  and  SOUZA FILHO, Francisco José de. Radiographic evaluation of root canal filling using different auxiliary chemical substances. Rev. Assoc. Paul. Cir. Dent. [online]. 2014, vol.68, n.4, pp. 357-363. ISSN 0004-5276.

The aim of this prospective randomized study, conducted in vivo, was to analyze the influence of two auxiliary chemicals in filling accessory canals and apical foramen by sealer and the prevalence of these channels in the age group 13 to 79 years, in various dental groups, in vital and non-vital teeth and root canal retreatment. Two hundred forty patients were treated and 301 endodontic treatments were completed. The auxiliary chemicals used were 2% chlorhexidine gel (n = 145) and 5.25% sodium hypochlorite (n = 156). The teeth were instrumented by crown-down technique with patency and enlargement of the apical foramen and obturated by the thermoplastic gutta-percha technique. Three independent observers (triple blind) evaluated radiographically obturation of accessory canals and apical foramen by the sealer that was recorded and expressed as a percentage. Data were statistically analyzed using the Binominal and Qui Quadrado tests. The results showed that the apical foramen was filled in 98.34% (296/301) and the accessories channels were filled and radiographically visible in 47.84% (144/301) of teeth treated. Accessory canals were found in 55% (99/180) of the teeth multirooted and 37.20% (45/121) of single-rooted teeth. According to the state of pulp, accessory canals were found in 55.20% (69/125) of vital teeth, 49.00% (49/100) of non-vital teeth and 34.21% (26/76) of endodontic retreatment. It was concluded that among the factors examined, there was no statistically significant difference between the two groups.

Keywords : root canal therapy; chlorhexidine; sodium hypochlorite; extravasation of diagnostic and therapeutic materials.