Eficacia del sistema SAF en la instrumentación endodóntica

Abstract

The SAF file (Self-Adjusting File) is a root canal system manufactured in nickel-titanium alloy, designed as a single file. It is capable of adapting to the walls of the duct and an accessory for the irrigation that acts through its hollow stem, all with the objective of achieving the disinfection of the duct system. A bibliographic review is performed to know the system and to verify how it acts in different aspects of root canal treatments. By means of the information obtained from the scientific literature could establish the following criteria: debridement capacity, prevention of the apical transport, quality of obturation and effectiveness in the root canal retreatment. Among the results, various studies have been observed based on three-dimensional images with MicroCT, as well as histological studies, that reveal the homogeneity of the instrumented ducts, unlike other conventional rotary systems. That is, the SAF file is capable of adapting to the internal root anatomy. however, in the third apical, no significant differences were found. Certain anatomies as some types of ducts in C are ideal for the instrumentation philosophy, but some authors have left its use as a single file open to doubt and they explain to us that the results obtained by means of MicroCT studies should be interpreted as the capacity of the SAF system to remodel the duct, which does not mean achieving the antimicrobial objective of the treatment as the microbiological studies have shown. During root canal retreatment, effectiveness has been demonstrated in the removal of gutta-percha, in combination with other rotary systems.