Structural characterisation and mechanical fe analysis of conventional and m-wire Ni-Ti alloys used in endodontic rotary instruments
Authors: Montalvão, D., Alçada, F.S., Braz Fernandes, F.M. and De Vilaverde-Correia, S.
Journal: The Scientific World Journal
Volume: 2014
eISSN: 1537-744X
DOI: 10.1155/2014/976459
Abstract:The purpose of this study is to understand how the M-Wire alloy conditions the mechanical flexibility of endodontic rotary files at body temperature.Two different rotary instruments, a Profile GT 20/.06 and a Profile GT Series X 20/.06, were selected due to their geometrical similarity and their different constituent alloy. GT series X files are made from M-Wire, a Ni-Ti alloy allegedly having higher flexibility at body temperature. Both files were analysed by X-Ray Diffraction and Differential Scanning Calorimetry to investigate phase transformations and the effects of working temperature on these different alloys. Mechanical behaviour was assessed by means of static bending and torsional Finite Element simulations, taking into account the nonlinear superelastic behaviour of Ni-Ti materials. It was found that GT files present austenitic phase at body temperature, whereas GT series X present R-phase at temperatures under 40°C with a potential for larger flexibility. For the same load conditions, simulations showed that the slight geometrical differences between the two files do not introduce great disagreement in the instruments' mechanical response. It was confirmed that M-Wire increases the instrument's flexibility, mainly due to the presence of R-phase at body temperature. © 2014 Diogo Montalvão et al.
https://eprints.bournemouth.ac.uk/24571/
Source: Scopus
Structural characterisation and mechanical FE analysis of conventional and M-Wire Ni-Ti alloys used in endodontic rotary instruments.
Authors: Montalvão, D., Alçada, F.S., Braz Fernandes, F.M. and de Vilaverde-Correia, S.
Journal: ScientificWorldJournal
Volume: 2014
Pages: 976459
eISSN: 1537-744X
DOI: 10.1155/2014/976459
Abstract:The purpose of this study is to understand how the M-Wire alloy conditions the mechanical flexibility of endodontic rotary files at body temperature.Two different rotary instruments, a Profile GT 20/.06 and a Profile GT Series X 20/.06, were selected due to their geometrical similarity and their different constituent alloy. GT series X files are made from M-Wire, a Ni-Ti alloy allegedly having higher flexibility at body temperature. Both files were analysed by X-Ray Diffraction and Differential Scanning Calorimetry to investigate phase transformations and the effects of working temperature on these different alloys. Mechanical behaviour was assessed by means of static bending and torsional Finite Element simulations, taking into account the nonlinear superelastic behaviour of Ni-Ti materials. It was found that GT files present austenitic phase at body temperature, whereas GT series X present R-phase at temperatures under 40 °C with a potential for larger flexibility. For the same load conditions, simulations showed that the slight geometrical differences between the two files do not introduce great disagreement in the instruments' mechanical response. It was confirmed that M-Wire increases the instrument's flexibility, mainly due to the presence of R-phase at body temperature.
https://eprints.bournemouth.ac.uk/24571/
Source: PubMed
Structural Characterisation and Mechanical FE Analysis of Conventional and M-Wire Ni-Ti Alloys Used in Endodontic Rotary Instruments
Authors: Montalvao, D., Alcada, F.S., Braz Fernandes, F.M. and de Vilaverde-Correia, S.
Journal: SCIENTIFIC WORLD JOURNAL
ISSN: 1537-744X
DOI: 10.1155/2014/976459
https://eprints.bournemouth.ac.uk/24571/
Source: Web of Science (Lite)
Structural characterisation and mechanical FE analysis of conventional and M-Wire Ni-Ti alloys used in endodontic rotary instruments.
Authors: Montalvão, D., Alçada, F.S., Braz Fernandes, F.M. and de Vilaverde-Correia, S.
Journal: TheScientificWorldJournal
Volume: 2014
Pages: 976459
eISSN: 1537-744X
ISSN: 2356-6140
DOI: 10.1155/2014/976459
Abstract:The purpose of this study is to understand how the M-Wire alloy conditions the mechanical flexibility of endodontic rotary files at body temperature.Two different rotary instruments, a Profile GT 20/.06 and a Profile GT Series X 20/.06, were selected due to their geometrical similarity and their different constituent alloy. GT series X files are made from M-Wire, a Ni-Ti alloy allegedly having higher flexibility at body temperature. Both files were analysed by X-Ray Diffraction and Differential Scanning Calorimetry to investigate phase transformations and the effects of working temperature on these different alloys. Mechanical behaviour was assessed by means of static bending and torsional Finite Element simulations, taking into account the nonlinear superelastic behaviour of Ni-Ti materials. It was found that GT files present austenitic phase at body temperature, whereas GT series X present R-phase at temperatures under 40 °C with a potential for larger flexibility. For the same load conditions, simulations showed that the slight geometrical differences between the two files do not introduce great disagreement in the instruments' mechanical response. It was confirmed that M-Wire increases the instrument's flexibility, mainly due to the presence of R-phase at body temperature.
https://eprints.bournemouth.ac.uk/24571/
Source: Europe PubMed Central
Structural characterisation and mechanical FE analysis of conventional and M-Wire Ni-Ti alloys used in endodontic rotary instruments.
Authors: Montalvão, D., Alçada, F.S., Braz Fernandes, F.M. and de Vilaverde-Correia, S.
Journal: Scientific World Journal
Volume: 2014
Pages: 976459
ISSN: 2356-6140
Abstract:The purpose of this study is to understand how the M-Wire alloy conditions the mechanical flexibility of endodontic rotary files at body temperature.Two different rotary instruments, a Profile GT 20/.06 and a Profile GT Series X 20/.06, were selected due to their geometrical similarity and their different constituent alloy. GT series X files are made from M-Wire, a Ni-Ti alloy allegedly having higher flexibility at body temperature. Both files were analysed by X-Ray Diffraction and Differential Scanning Calorimetry to investigate phase transformations and the effects of working temperature on these different alloys. Mechanical behaviour was assessed by means of static bending and torsional Finite Element simulations, taking into account the nonlinear superelastic behaviour of Ni-Ti materials. It was found that GT files present austenitic phase at body temperature, whereas GT series X present R-phase at temperatures under 40 °C with a potential for larger flexibility. For the same load conditions, simulations showed that the slight geometrical differences between the two files do not introduce great disagreement in the instruments' mechanical response. It was confirmed that M-Wire increases the instrument's flexibility, mainly due to the presence of R-phase at body temperature.
https://eprints.bournemouth.ac.uk/24571/
http://www.hindawi.com/journals/tswj/2014/976459/
Source: BURO EPrints