Comparative in vitro study of root canal transportation, using three nickel-titanium rotary systems: hero shaper, protaper universal
Keywords:Canal preparation, Transportation, Rotary systems
Introduction: the objective of this in vitro study was to compare the degree of transportation of root canals using three rotary systems: HERO Shaper, ProTaper Universal, and Race. Methods: a sample of thirty buccal root canals of upper molars with curvatures between 25 and 35º was divided into three random groups of ten canals each, which were then instrumented by using the rotary systems HERO Shaper, ProTaper Universal, and Race respectively, all to a diameter # 30 to the working length, using the motor NSK Endo-Mate TC to control torque and speed. Radiographs were taken before and after mechanical instrumentation, and they were scanned with DuoScan Agfa T1200 scanner at a resolution of 2400 dpi gray scale. Afterwards, by the method of lineal morphometry and using the computer system for digital images NIH imageJ, a total of 12 measurements per root canal were done: 4 for the total root width, 4 for the concave wall and 4 for the convex wall, all at 1, 2, 4 and 6 mm respectively from the radiographic apex of the canal. The data were analyzed by using the Mann Whitney Rank Sum and Kruskal Wallis nonparametric statistical analysis for independent samples. Results: Transportation was observed from the root canal to the concave wall when the ProTaper Universal system was used, being statistically significant (p = 0,01). Conclusion: the ProTaper Universal rotary system produced the greatest number of transportations when compared with HERO Shaper and RaCe systems.
How to Cite
Copyright comprises moral and patrimonial rights.
1. Moral rights: are born at the moment of the creation of the work, without the need to register it. They belong to the author in a personal and unrelinquishable manner; also, they are imprescriptible, unalienable and non negotiable. Moral rights are the right to paternity of the work, the right to integrity of the work, the right to maintain the work unedited or to publish it under a pseudonym or anonymously, the right to modify the work, the right to repent and, the right to be mentioned, in accordance with the definitions established in article 40 of Intellectual property bylaws of the Universidad (RECTORAL RESOLUTION 21231 of 2005).
2. Patrimonial rights: they consist of the capacity of financially dispose and benefit from the work trough any mean. Also, the patrimonial rights are relinquishable, attachable, prescriptive, temporary and transmissible, and they are caused with the publication or divulgation of the work. To the effect of publication of articles in the journal Revista de la Facultad de Odontología, it is understood that Universidad de Antioquia is the owner of the patrimonial rights of the contents of the publication.
The content of the publications is the exclusive responsibility of the authors. Neither the printing press, nor the editors, nor the Editorial Board will be responsible for the use of the information contained in the articles.
I, we, the author(s), and through me (us), the Entity for which I, am (are) working, hereby transfer in a total and definitive manner and without any limitation, to the Revista Facultad de Odontología Universidad de Antioquia, the patrimonial rights corresponding to the article presented for physical and digital publication. I also declare that neither this article, nor part of it has been published in another journal.
Open Access Policy
The articles published in our Journal are fully open access, as we consider that providing the public with free access to research contributes to a greater global exchange of knowledge.
Creative Commons License
The Journal offers its content to third parties without any kind of economic compensation or embargo on the articles. Articles are published under the terms of a Creative Commons license, known as Attribution – NonCommercial – Share Alike (BY-NC-SA), which permits use, distribution and reproduction in any medium, provided that the original work is properly cited and that the new productions are licensed under the same conditions.
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.