Influence of sodium hypochlorite on cyclic fatigue resistance of nickel-titanium instruments: A systematic review and meta-analysis of in vitro studies.
Cyclic fatigue resistance
Meta-analysis
Nickel-titanium instruments
Root canal irrigants
Sodium hypochlorite
Systematic review
Journal
Clinical oral investigations
ISSN: 1436-3771
Titre abrégé: Clin Oral Investig
Pays: Germany
ID NLM: 9707115
Informations de publication
Date de publication:
Nov 2023
Nov 2023
Historique:
received:
15
09
2022
accepted:
05
09
2023
medline:
8
11
2023
pubmed:
14
9
2023
entrez:
13
9
2023
Statut:
ppublish
Résumé
This systematic review/meta-analysis investigated the influence of NaOCl on cyclic fatigue resistance of endodontic NiTi instruments. A systematic search until July 2022 in PubMed/MEDLINE, Embase, Scopus, Web of Science, SciELO, Cochrane Library, and grey literature was conducted. According to the PECOS strategy, only in vitro studies evaluating the effects of NaOCl on the cyclic fatigue resistance of NiTi instruments were eligible. Cyclic fatigue resistance was the primary outcome. A modified Joanna Briggs Institute's Checklist was used for risk of bias assessment. Of the 2,445 records screened, 37 studies were included. Most studies used simulated canals made of stainless-steel block with severe to moderate curvatures. NaOCl concentration varied from 1-6%, mainly at 37 °C. Regarding fatigue resistance, 23 studies using 1.2% to 6% NaOCl showed a reduction in the resistance compared to the control groups, especially when pre-heated. Four meta-analyses were performed according to the tested NiTi systems. The meta-analyses indicated that the PTU F2 files had higher reduction of fatigue resistance after exposure to 5.25% NaOCl; no differences between NaOCl and no immersion were observed for Reciproc R25, WaveOne 25.08, and WaveOne Gold Primary files. Included studies had low risk of bias. NaOCl appears to reduce cyclic fatigue resistance of certain NiTi files, especially when they are pre-heated, particularly in conventional NiTi files compared to some heat-treated instruments. It is possible that the temperature of the solution may have a greater influence on resistance than NaOCl itself. Important to note that an overall tendency toward no significant influence was observed among various systems. Precautions are necessary when a pre-heated high-concentration NaOCl is used to enhance its properties during root canal preparation, mainly using conventional wire.
Identifiants
pubmed: 37704917
doi: 10.1007/s00784-023-05243-4
pii: 10.1007/s00784-023-05243-4
doi:
Substances chimiques
Sodium Hypochlorite
DY38VHM5OD
titanium nickelide
12035-60-8
Nickel
7OV03QG267
Titanium
D1JT611TNE
nitinol
2EWL73IJ7F
Types de publication
Meta-Analysis
Systematic Review
Journal Article
Review
Langues
eng
Pagination
6291-6319Subventions
Organisme : Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
ID : 88887.649870/2021-00
Informations de copyright
© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
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