Does the type of endodontic access influence in the cyclic fatigue resistance of reciprocating instruments?

Clinical Oral Investigations
Emmanuel João Nogueira Leal SilvaVictor Talarico Leal Vieira

Abstract

The aim of the present study was to compare the cyclic fatigue resistance of Reciproc R25 (R25) and Reciproc Blue R25 (R25B) instruments, after simulated clinical use in traditional (TradAC) and ultraconservative (UltraAC) endodontic access cavities. Forty mandibular molars were randomly assigned into the following groups, according to the type of access and instrument to be used: TradAC and R25, TradAC and R25B, UltraAC and R25, and UltraAC and R25B. Teeth were accessed accordingly, and the root canals were prepared using "RECIPROC ALL" kinematics. The cyclic fatigue resistance of the forty used instruments was obtained measuring the time to fracture in an artificial stainless-steel canal. Ten brand new R25 and R25B were used as control groups. The fracture surfaces and the side cutting edges of the instruments were examined with a scanning electron microscope. Data were statistically analyzed using one-way ANOVA and post hoc Tukey tests with a significance level of P < 0.05. R25B instruments showed significantly higher cyclic fatigue resistance than R25, regardless of the access cavity type (P < 0.05). No differences were observed in the cyclic fatigue resistance between instruments without simulated clinical use and used in ...Continue Reading

References

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Feb 3, 2018·Clinical Oral Investigations·Emmanuel João Nogueira Leal SilvaEdson Jorge Lima Moreira

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Citations

Sep 26, 2021·International Endodontic Journal·Ana Raquel Lopes Dos Santos MirandaPatrícia de Almeida Rodrigues

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