| Título: | A Comparison of Mtwo Rotary File with K-File on Negotiation of Second Mesiobuccal Canal in Maxillary First Molar: A Clinical Study |
| Autores: |
Honardar, Kiamars; Department of Endodontics, Dental School, Shahed University of Medical Sciences, Tehran, Iran Vesal, Nahal; Endodontist, Tehran, Iran Hamze, Faeze; General Practitioner, Tehran, Iran Nazarimoghadam, Kiumars; Department of Endodontics, Dental School, Shahed University of Medical Sciences, Tehran, Iran Labaf, Hossein; Department of Endodontics, Dental School, Shahed University of Medical Sciences, Tehran, Iran Shakeri, Laila; Department of Endodontics, Dental School, Shahed University of Medical Sciences, Tehran, Iran |
| Fecha: | 2008-11-02 |
| Publicador: |
Iranian Endodontic Journal محله ایرانی اندودونتیکس |
| Fuente: |
Ver documento |
| Tipo: |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| Tema: | First Molar; Maxillary; MB2; Mtwo File; Negotiation; Root Canal |
| Descripción: | INTRODUCTION: This study was carried out to compare the capability of K-files with Mtwo rotary file in terms of negotiation as well as depth of penetration in second mesiobuccal (MB2) canal of maxillary first molar. MATERIALS AND METHODS: A total of 32 MB2 canal of maxillary first molars having different root curvatures (not more than 30 degree) and root lengths were selected and then detected by K-file #10, #8 and #6. Based upon file penetration the samples were assigned into four groups. Group A: K-file #10 penetrate>2mm into coronal third, group B: K-file #10 could penetrate<2mm into coronal third, continue proceeding with #8 which had>2mm penetration, group C: K-files #10 and 8 could penetrate<2mm, continue proceeding with #6 for deeper penetration, and group D: Mtwo file #10/.04 was applied into all three above groups until resistance was felt. Finally, accurate working lengths at each group after K-file #10 insertions into the canal were determined radiographically. The mean depths of root canal penetration were analyzed statistically using Duncan test by SAS software (version 9.1) in GLM procedure. RESULTS: The mean of initial penetration for #10 Mtwo files was 19.16 mm, whilst it was 7.72 mm for K-File #6, 10.72 mm for K-File #8, and 12 mm for K-File #10. The difference between Mtwo rotary files and hand K-Files was statistically significant (P<0.01). CONCLUSION: Mtwo rotary files could be an efficient substitute for hand files to negotiate MB2 canal both more easily and rapidly. To our knowledge, it is the first time that a NiTi rotary file showed success in negotiation of any canal. |
| Idioma: | Inglés |
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