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In vitro study of structural and chemical changes in two reciprocating files after multiple reuses and sterilisation.
Marim, Amanda Zambaldi; Bueno, Carlos Eduardo da Silveira; Stringheta, Carolina Pessoa; Pelegrine, Rina Andrea; De Martin, Alexandre Sigrist; Rocha, Daniel Guimarães Pedro; Nascimento, Wayne Martins; Limoeiro, Ana Grasiela; Fontana, Carlos Eduardo.
Affiliation
  • Marim AZ; Department of Endodontics, São Leopoldo Mandic School, São Leopoldo Mandic Research Center, São Paulo, Brazil.
  • Bueno CEDS; Department of Endodontics, São Leopoldo Mandic School, São Leopoldo Mandic Research Center, São Paulo, Brazil.
  • Stringheta CP; Department of Endodontics, São Leopoldo Mandic School, São Leopoldo Mandic Research Center, São Paulo, Brazil.
  • Pelegrine RA; Department of Endodontics, São Leopoldo Mandic School, São Leopoldo Mandic Research Center, São Paulo, Brazil.
  • De Martin AS; Department of Endodontics, São Leopoldo Mandic School, São Leopoldo Mandic Research Center, São Paulo, Brazil.
  • Rocha DGP; Pontifical Catholic University of Campinas, Department of Endodontics, Center os Life Sciences, São Paulo, Brazil.
  • Nascimento WM; Department of Endodontics, São Leopoldo Mandic School, São Leopoldo Mandic Research Center, São Paulo, Brazil.
  • Limoeiro AG; Department of Dentistry, Endodontics and Dental Materials, Bauru Dental School, University of São Paulo, São Paulo, Brazil.
  • Fontana CE; Pontifical Catholic University of Campinas, Programa de Pós-Graduação Em Ciências da Saúde, Center os Life Sciences, São Paulo, Brazil.
Aust Endod J ; 2024 May 21.
Article in En | MEDLINE | ID: mdl-38773855
ABSTRACT
To use scanning electron microscopy and energy dispersive X-ray spectroscopy to evaluate the metallurgical-chemical changes of WaveOne Gold (WOG) and R-Motion (RM), after multiple uses. The instruments were divided into groups (n = 8) WOG and RM-control groups, new instruments; WOG1 and RM1; WOG2 and RM2; WOG3 and RM3 after instrumentation of 1, 2 or 3 molars, respectively. Burrs occurred mainly in the control group and after the first use. The RM files were found to have a higher nickel content, which increased during reuse, and a decrease in oxygen content with increasing reuse, in addition to calcium impregnation, which occurred in greater amounts in the corrosion areas in the WOG files. The presence of topographic and chemical changes was demonstrated, indicating that caution should be taken when reusing endodontic instruments to avoid fractures.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Aust Endod J Journal subject: ODONTOLOGIA Year: 2024 Document type: Article Affiliation country: Brazil Country of publication: Australia
Fulltext
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Full text: 1 Collection: 01-internacional Database: MEDLINE Language: En Journal: Aust Endod J Journal subject: ODONTOLOGIA Year: 2024 Document type: Article Affiliation country: Brazil Country of publication: Australia