Eficácia de instrumentos rotatórios de NiTi e solventes de guta-percha nas reintervenções endodônticas

Abstract

Has been observed that failure in endodontic treatment is related to a deficiency in cleaning in chemomechanical preparation, favoring the microorganisms persistence. In order to restore periapical health through complete removal of filling material, an endodontic reintervention is indicated. The aim of this literature review study was to compare the effectiveness of NiTi rotary instruments and solvents in the removal of filling material waste in root canals walls during endodontic retreatment. The use of rotary systems and the use of solvents in endodontic reinterventions have been proposed as methods to facilitate and expedite this procedure. The anatomy of curve root canals difficult endodontic retreatment, causing changes in the original form of canal, in work length and even canal transportation. These situations can be minimized when used conventional NiTi rotary systems or proper for retreatment, which have proved most effective and fast when compared to stainless steel hand files. It has been shown that the use of solvents provided the removal of filling material without damage to the tooth and a faster. Conclude that NiTi rotary files are effective in endodontic reintervention and the use of solvents makes this procedure faster and safer, but no observed retreatment technique is able to completely remove the remaining filling material.