Análise do desempenho de um cabo adaptador endodôntico que permite a adaptação de instrumentos mecanizados de niti para

Abstract

INTRODUCTION: Endodontic treatment is based on the physicochemical action of instruments, irrigating solutions, intracanal medication and filling cements. It is through the chemical-mechanical preparation that a significant reduction in the number of microorganisms is promoted. For this, it is necessary to use instruments and preparation techniques that allow this role to be fulfilled even in face of the different anatomical conditions of the root canals. Mechanized nickel-titanium (NiTi) instruments are the ones that best perform this function. Proposing to adapt mechanized instruments for manual use, the ED File®

adapter cable is an alternative for those who do not have an endodontic engine.OBJECTIVES: The aim of the present study was to analyze the performance of an endodontic adapter cable that allows the adaptation of mechanized NiTi instruments for manual use after performing a pre-clinical undergraduate practical activity on root canal preparation, through an observational study. descriptive and qualitative. METHODOLOGY: 10 students were selected, who had not had contact with Endodontics. Two artificial teeth, with access surgery previously performed, were given to the students, so that they could prepare the root canals with each of the instruments. For the artificial tooth prepared with stainless steel files, type K files and the conventional instrumentation technique (TCI), “step-back” were used. For the preparation with a mechanized NiTi instrument adapted with the ED File®, the instrument ProDesign Logic® #35/05 and the technique of “Controlled Cutting Force” (FCC), “crown-down” were used. The execution time of each technique was timed for each student. After performing the pre-clinical practical activity, students were submitted to a questionnaire that assessed the usability of the adapter, the ease and safety of each technique and the possibility of future use. Descriptive statistics of time were performed. After checking the compliance with the assumptions of normality, the Student's t test for paired samples was performed. The level of significance adopted was 5% with the SPSS program from IBM®, Microsoft. RESULTS: The ED File® cable attached to the ProDesign Logic® instrument #35/05 fulfilled its role as an adapter, allowing manual use of the instrument. The FCC technique proved to be superior to the TCI in terms of ease and safety in carrying out the preparation. The preparation time was significantly shorter (p<0.003) for the FCC technique. CONCLUSION: The ED File® adapter cable showed satisfactory performance by allowing the adaptation of a mechanized, heat-treated NiTi instrument for manual use. The FCC technique was considered simple to understand and safe, being able to reduce the operator's work time and improve the predictability of endodontic treatment.