Exactitud en la medición de longitud de trabajo y sus factores intervinientes, comparando cuatro localizadores apicales : estudio in vitro.

Abstract

Introduction: Within the processes to carry out a successful endodontic treatment, is the determination of the length of work also known as conductometry. The purpose of this phase is to define a measure of length that will correspond to the distance from a coronal reference point to the point where the proper instrumentation and obturation of the root channel will be performed. Phase considered critical since it is not delimited with accuracy can be cause of an endodontic failure. Objective: Determine which of the four apical locators has greater accuracy when determining the length of work and if the humidity condition influences the taking of it. Materials and methods: Investigation of transverse type, experimental in vitro, in which 40 unirradicular teeth were collected, which were randomly divided into four groups of 10, to which a locator was assigned: Group (Propex II), Group (Raypex 6) , Group (Propex Pixi), Group (Root ZX). Conductometry was performed in each group at 0.5mm from the apical foramen. The apical 4mm of each duct was worn to expose the file, the distance from the tip of the instrument to the major foramen was recorded under an operating microscope. Results: Root ZX was the apical locator with the highest accuracy with 50%, followed by Propex II with 40%, 30% for Propex Pixi as well as Raypex 6. Conclusions: If we considered the accuracy of the locators to -0.5 mm of the largest foramen, the most reliable would be the Root ZX II followed by Propex II.