EVALUATION OF THE EFFECTIVENESS OF REMOVING THE FILLING MATERIAL CARRIED OUT BY THE PROTAPER UNIVERSAL SYSTEM RETREATMENT ASSOCIATED WITH A PROTAPER UNIVERSAL F4 FILE AND THE RECIPROC SYSTEM, WITH AND WITHOUT THE AID OF THE OPERATING MICROSCOPE

• DOI: 10.22533/at.ed.159382331015

• Palavras-chave: Retratamento. Reciproc. ProTaper. Microscópio Operatório

• Keywords: Retreatment. Reciproc. ProTaper. Operating microscope.

• Abstract:

  The maximum removal of filling material from the root canal system is essential for the success of endodontic reintervention to be achieved. The objective of this study was to compare the effectiveness of removing filling material from root canals between the ProTaper Universal Retreatment (PUR) system associated with the ProTaper Universal (PTU) F4 file, and the R40 file of the Reciproc system, with and without the use of a microscope (OM) as an auxiliary means. Sixty mandibular premolars with a single canal and straight roots were instrumented, filled and randomly divided into four experimental groups (n=15), according to the unfilling technique to be performed: PUR followed by the use of the PTU F4 file, Reciproc R40, PUR followed by the use of the PTU F4 file and OM help, Reciproc R40 with OM help. After unfilling, the teeth were longitudinally sectioned, photographed and analyzed, quantifying the percentage of residual filling material in each third of the root canal. The sequence of statistical tests used was: application of the Kruskal-Wallis Test, with significance level p<0.05, followed by application of the Mann-Whitney Test, adjusted by the Bonferroni Correction. The results showed that the Groups were statistically similar for the variables 'all canal', 'cervical third’ and ‘middle third' (P > 0.05). For the Variable 'apical third', the Group 'PUR + F4 with the aid of the microscope' was significantly better than the Group 'Reciproc with the aid of the microscope' (P = 0.02). It was concluded that the PUR + F4 systems and the R40 file of the Reciproc system were effectively similar in terms of their ability to remove filling material from the root canal system, regardless of whether or not the OM was used, differing only in the apical third, when associated with the use of OM, in which the PUR + F4 system was more effective.