Structural Characterisation and Mechanical FE Analysis of Conventional and M-Wire Ni-Ti Alloys Used in Endodontic Rotary Instruments
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 dif...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2014-01-01
|
| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2014/976459 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850110830601830400 |
|---|---|
| author | Diogo Montalvão Francisca Sena Alçada Francisco Manuel Braz Fernandes Sancho de Vilaverde-Correia |
| author_facet | Diogo Montalvão Francisca Sena Alçada Francisco Manuel Braz Fernandes Sancho de Vilaverde-Correia |
| author_sort | Diogo Montalvão |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-425aa26e84da47cdb0e0c688262bffe7 |
| institution | OA Journals |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-425aa26e84da47cdb0e0c688262bffe72025-08-20T02:37:46ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/976459976459Structural Characterisation and Mechanical FE Analysis of Conventional and M-Wire Ni-Ti Alloys Used in Endodontic Rotary InstrumentsDiogo Montalvão0Francisca Sena Alçada1Francisco Manuel Braz Fernandes2Sancho de Vilaverde-Correia3School of Engineering and Technology, University of Hertfordshire, College Lane, Hatfield, Hertfordshire AL10 9AB, UKThe Dental Implant and Gingival-Plastic Surgery Centre, 717 Christchurch Road, Bournemouth, Dorset BH7 6AF, UKCENIMAT/I3N, Materials Science Department, Faculty of Science and Technology, New University of Lisbon, Campus of Caparica, 2829-516 Caparica, PortugalCENIMAT/I3N, Materials Science Department, Faculty of Science and Technology, New University of Lisbon, Campus of Caparica, 2829-516 Caparica, PortugalThe 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.http://dx.doi.org/10.1155/2014/976459 |
| spellingShingle | Diogo Montalvão Francisca Sena Alçada Francisco Manuel Braz Fernandes Sancho de Vilaverde-Correia Structural Characterisation and Mechanical FE Analysis of Conventional and M-Wire Ni-Ti Alloys Used in Endodontic Rotary Instruments The Scientific World Journal |
| title | Structural Characterisation and Mechanical FE Analysis of Conventional and M-Wire Ni-Ti Alloys Used in Endodontic Rotary Instruments |
| title_full | Structural Characterisation and Mechanical FE Analysis of Conventional and M-Wire Ni-Ti Alloys Used in Endodontic Rotary Instruments |
| title_fullStr | Structural Characterisation and Mechanical FE Analysis of Conventional and M-Wire Ni-Ti Alloys Used in Endodontic Rotary Instruments |
| title_full_unstemmed | Structural Characterisation and Mechanical FE Analysis of Conventional and M-Wire Ni-Ti Alloys Used in Endodontic Rotary Instruments |
| title_short | Structural Characterisation and Mechanical FE Analysis of Conventional and M-Wire Ni-Ti Alloys Used in Endodontic Rotary Instruments |
| title_sort | structural characterisation and mechanical fe analysis of conventional and m wire ni ti alloys used in endodontic rotary instruments |
| url | http://dx.doi.org/10.1155/2014/976459 |
| work_keys_str_mv | AT diogomontalvao structuralcharacterisationandmechanicalfeanalysisofconventionalandmwirenitialloysusedinendodonticrotaryinstruments AT franciscasenaalcada structuralcharacterisationandmechanicalfeanalysisofconventionalandmwirenitialloysusedinendodonticrotaryinstruments AT franciscomanuelbrazfernandes structuralcharacterisationandmechanicalfeanalysisofconventionalandmwirenitialloysusedinendodonticrotaryinstruments AT sanchodevilaverdecorreia structuralcharacterisationandmechanicalfeanalysisofconventionalandmwirenitialloysusedinendodonticrotaryinstruments |