Avaliação da eficácia do Root ZX II e Novapex na localização do forame apical realizada por dois operadores distintos e comparada com radiografia digital

Abstract

Determining the working length is crucial for the appropriate instrumentation and obturation of the root canal system in endodontic treatment. The purpose of this study was to evaluate, in vitro, the efficacy of electronic foramen apical locators - Root ZX II and Novapex, as well as the influence of the operator and also, analyze ortho-radial and angled radiographic digital images, of the measurements obtained. The study was approved by COEP/Plataforma Brasil (protocol 30236614.2.0000.5149). Digital radiography study, coronary opening and proof of foraminal patency with surgical microscope (real measurement) were performed on 31 extracted human teeth. Measurements using Root ZX II and Novapex were made by two different operators and it was considered right when matching with the real measurement as in the following: operator I - Root ZX II 36.1%, Novapex 27.8%; operator II - Root ZX II 33.3%, Novapex 25%. In over 50% of cases the radiographic images were able to determine, either the correct measurements or errors of the electronic locators. It was concluded that Root ZX II and Novapex failed in determining the real measurement of the most root canals, for both operators, which could be minimized with the association of radiographic technique.