Morphological alterations of rotary nickel-titanium protaper® instruments analyzed by SEM: effect of nitrogen ion implantation
Abstract Purpose:This study evaluated the morphological alterations that occur in rotary nickel-titanium instruments during nitrogen-ion implantation. Methods: Instruments were divided into three groups: Group A- ProTaper SX instruments were subjected to ionic implantation with bands of nitrogen ion...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | Brasil |
| Institución: | Pontifícia Universidade Católica do Rio Grande do Sul (PUCRS) |
| Repositorio: | Revista odonto ciência (Online) |
| Idioma: | inglés |
| OAI Identifier: | oai:ojs.revistaseletronicas.pucrs.br:article/13046 |
| Acceso en línea: | https://revistaseletronicas.pucrs.br/fo/article/view/13046 |
| Access Level: | acceso abierto |
| Palabra clave: | Endodontics scanning electron microscopy nickel-titanium Endodontia Microscopia Eletrônica de Varredura níquel-titânio |
| Sumario: | Abstract Purpose:This study evaluated the morphological alterations that occur in rotary nickel-titanium instruments during nitrogen-ion implantation. Methods: Instruments were divided into three groups: Group A- ProTaper SX instruments were subjected to ionic implantation with bands of nitrogen ions at 100 keV, ion dose was 1.0 X 1017 ions/cm², Group B- ProTaper SX instruments were subjected to ionic implantation with bands of nitrogen ions at 200 keV, ion dose was 1.0 X 1017 ions/cm², and Group C instruments served as unmodified controls. Each instrument was utilized to prepare five canals in epoxy resin blocks with a brushing motion. The instruments were examined by scanning electron microscopy (SEM) before use and after 60 s and 300 s of work inside canals in epoxy resin blocks. Results: Material loss and distortion were statistically similar in all groups. However, while only one instrument in group A and only one instrument in group B fractured during use, three instruments in group C fractured during use. Conclusion: Nitrogen ion implantation can improve the properties of nickel-titanium rotary instruments. However, widespread adoption by the dental industry may not yet be tenable due to the cost (nitrogen ion implantation is a costly process) and relatively small benefit. |
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