Holguín SMP, Santana ZF, Aseff SE, de la Fuente CLP, Martínez MMA, Anaya RJ

Language: Spanish
References: 6
Page: 178-182
PDF size: 190.12 Kb.

ABSTRACT

Rotary systems are resilient files made from nickel-titanium alloys that are more flexible than their steel counterparts. This enables curved canals to be treated and the remaining pulp and dentin debris to be removed, as well as allowing the canal to be shaped. Most operate at between 250 and 500 rpm. The aim of this study is to assess cyclic fatigue on the body and tip of the EndoSequence, Liberator, and K3 rotary files after instrumentation of root canals. Material and methods: 15 extracted molars were disinfected using NaOCl; cusp ridges were worn down to provide a smooth reference point. The molars were then randomly divided into three groups and instrumented using EndoSequence, Liberator, and K3 rotary files, which were then examined under a scanning electron microscope (SEM) to measure cyclic fatigue. Results: The EndoSequence presented less fatigue along its structure and damage to the tip, with a variation of 2.96/-0.08; the straight-fluted Liberator presented significant damage to the body of the file and a certain amount of damage to its non-cutting tip, with a variation of 5.83/-13.48; the K3, meanwhile, displayed wear along its structure and major damage to the tip, with a variation of 5.57/-32.05. Conclusions: The rotary systems in question suffer from cyclic fatigue after five canal treatments. The Liberator displayed the most wear on its surface, while the K3 suffered more wear to the tip, with the EndoSequence showing the least fatigue on its surface and tip.

REFERENCES

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