Comparação da obturação endodôntica pelas técnicas de condensação lateral, híbrida de Tagger e Thermafil: estudo piloto com Micro-tomografia computorizada

Abstract

Aim The aim of this in vitro pilot study was to evaluate the quality of root canal filling of three different techniques: lateral condensation, Tagger hybrid technique and Thermafil based on two parameters – voids (unfilled) areas and the absence or presence of extrusion of filling material. Materials and methods 18 mesial roots of human mandibular molars were prepared using rotary Ni-Ti files. After a biomechanical preparation, 15 teeth were randomly allocated to three treatment groups and within each group, teeth were filled using one of the three above-mentioned techniques. Three teeth were used to test the equipment SkyScan ® and his reconstruction and image analysis tools. The images were captured before preparation, after preparation and after filling. The volume of root filling voids (mm 3) was determined by microcomputed tomography imaging and the extrusion values were statistically analysed at a significance level of 0,05, or, at a confidence level of 95% (Kruskal-Wallis test). Results All techniques showed filling voids and the Thermafil was responsible for the highest volume recorded (median = 0,861 mm 3). It was also the one that resulted in a higher percentage of extrusion (42,86% of a total of 46,70%). Conclusions Lateral condensation showed the best results of the three studied techniques. The potentiality of the microcomputed tomography software deserves to be explored in future researches.