Efecto de distintos protocolos de irrigación en la resistencia a la fractura de dientes tratados endodónticamente

Abstract

The objectives: in endodontic therapy are prevention and the elimination of a microbial infection in the root canal system. This is done with instrumentation, irrigation and the adequate sealing of the root canals. A key factor in achieving a successful treatment is irrigation; nevertheless, irrigating has potential secondary detrimental effects, such as dentinal erosion. Objective: Quantifying the dentinal erosion in teeth caused by diverse irrigation protocols, and measuring its resistance to fracture. Material and Methods: A selection of 60 teeth with one canal was made. They were instrumented and placed in an acrylic base, and a simulation of the periodontal ligament was created. The teeth were divided in three groups. The first two, followed an irrigation protocol of EDTA and NaClO (1 or 20 minutes, depending on the group), and the third, a control group. The teeth were then subjected to pressure until fracture was achieved. Results: The average load in which the teeth were able to fracture was similar in the groups. however, there were slight differences between group 1 (NaClO, 1 minute), in comparison with the other groups. Conclusions: In this study, we determined that after removing the smear layer, there is no difference (1 or 20 minutes NaClO) in the resistance until fracture.