Evaluation of apical microleakage in obturated root canals those were prepared with a hand and a rotary technique

Abstract

Some of the improvements in endodontics in the latest years are the Nickel Titanium instruments as well as the different instrumentation techniques developed with rotary systems. In this study it was performed a comparison between the levels of apical microleakage of dye blue methylene, in superior premolars with twin, divergents roots, and completely closed apex where one of the roots was handled with the manual telescopic technique, and the other one with the Profile System. (Maillefer). K-Flexofile and files of the Profile System were used during the instrumentation process; ENDO-PTC was used as an auxiliary during the instrumentation. The irrigation was made with sodium hypochlorite at 1% and Tergensol for final flushing. Gutta-percha points and Endofill cement were the obturation choice, using lateral condensation technique. Apical infiltration was assessed by linear penetration on the stereomicroscope by two examiners. The results shown, that apical microleakage occurred, with hand or rotary technique. It was noticed that infiltration levels were superior in the sample instrumented with the rotary technique. In these teeth the apical matrix was handled with a smaller quantity of instruments. Statistically, infiltration values between the two groups was not significant (p= 0.0753).