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Influence of cyclic loading in NiTi austenitic and R-phase endodontic files from a finite element perspective.
Martins, Suzanny C S; Silva, Jessica D; Garcia, Paula R; Viana, Ana C D; Buono, Vicente T L; Santos, Leandro A.
Afiliação
  • Martins SCS; Department of Metallurgical and Materials Engineering, School of Engineering, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos, 6627-Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil.
  • Silva JD; Department of Metallurgical and Materials Engineering, School of Engineering, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos, 6627-Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil.
  • Garcia PR; Department of Restorative Dentistry, Faculty of Dentistry, Universidade Federal de Minas Gerais, (UFMG), Belo Horizonte, MG, Brazil.
  • Viana ACD; Department of Restorative Dentistry, Faculty of Dentistry, Universidade Federal de Minas Gerais, (UFMG), Belo Horizonte, MG, Brazil.
  • Buono VTL; Department of Metallurgical and Materials Engineering, School of Engineering, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos, 6627-Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil.
  • Santos LA; Department of Metallurgical and Materials Engineering, School of Engineering, Universidade Federal de Minas Gerais (UFMG), Av. Antônio Carlos, 6627-Campus Pampulha, Belo Horizonte, MG, 31270-901, Brazil. leandroarruda@ufmg.br.
Clin Oral Investig ; 26(5): 3939-3947, 2022 May.
Article em En | MEDLINE | ID: mdl-35039941
OBJECTIVES: This study aims to evaluate the effects of cyclic loading on the bending moments and the developed stress state of austenitic and R-phase endodontic files through finite element analysis. MATERIALS AND METHODS: The mechanical properties of two groups of NiTi wires, austenite and R-phase, were measured in samples at two different conditions: uncycled and cycled. The cycled condition was achieved by subjecting samples of the two groups to 80% of the corresponding fatigue life under rotating bending efforts. The measured mechanical properties were then used in the finite element analysis, where the boundary and loading conditions were set to replicate a standard bending test. RESULTS: The results showed that mechanical cycling leads to decreasing stress levels and bending moments in the simulated files, especially in the austenitic ones. In comparison with austenite, R-phase presented a more stable mechanical behavior during cycling. CONCLUSIONS: The results show that the moment and stress calculated for an instrument under bending can be considerably decreased after some cyclic work. CLINICAL RELEVANCE: The fatigue related to the clinical use of an endodontic file decreases the moment (as well as the forces) imposed by the instrument during the shaping of a curved root canal. This decrease is directly related to the type of atomic array present in the alloy.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Titânio / Ligas Dentárias Limite: Humans Idioma: En Revista: Clin Oral Investig Assunto da revista: ODONTOLOGIA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Titânio / Ligas Dentárias Limite: Humans Idioma: En Revista: Clin Oral Investig Assunto da revista: ODONTOLOGIA Ano de publicação: 2022 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha