Abstract
Aim: This experimental study in vitro aimed to compare the disinfection of the primary teeth root canals system using the rotary and reciprocating file system. Methodology: Forty-eight root canals from twenty-four primary molar teeth were contaminated with the standard strain of Enterococcus faecalis and randomically splitted into 4 groups (n=12). The Group PN comprised the root canals prepared with the ProTaperTM Next rotary system. The Group WOG was defined by the usage of WaveOneTM Gold reciprocating system. The files from both systems were thermo mechanical processed. The Group PU used the ProTaperTM Universal system, with no thermic treatment, and the Group C (negative control) received no treatment. Samples from the root canals were collected with sterile paper points before and after its preparation, diluted and distributed in plates with Brain Heart Infusion (BHI) agar. The bacterial colonies were counted and the results were statistic analyzed by Wilcoxon and Kruskal-Wallis (Dunn) tests. Results: There was significant bacterial reduction using the systems (p>0,01). However, there was no significant difference among them (p<0,05) (PN=3.38; WOG=3.85; PU=3.26). Conclusion: Both systems (rotary and reciprocating) provide disinfectionon the primary molar teeth root canals system.
Highlights
Dental caries lesions and trauma on the primary teeth may result in undesirable outcomes, which lead to endodontic therapy
A post-manufacturing procedure, the alloy is treated with heat and slowly cooled down to improve the strength and flexibility (Webber, 2015). They present metallurgical advances, which leads to qualification in the diameter tip of the instruments and its tapering, and shifting the cross section to improve flexibility, safety and cutting efficiency maintenance in the root canals preparation (Elemam et al, 2015; Webber, 2015) In light of this knowledge, it is appropriate to study the usage of these new rotary systems in the endodontic treatment of primary teeth
This paper aimed to compare in vitro the disinfection achieved by root canals instrumentation of primary teeth with the ProTaperTM and ProTaperTM Universal rotary systems, with and without thermo mechanical processing alloys, and with the WaveOneTM Gold reciprocating system, with thermal treatment, through the plates method
Summary
Dental caries lesions and trauma on the primary teeth may result in undesirable outcomes, which lead to endodontic therapy. They present metallurgical advances, which leads to qualification in the diameter tip of the instruments and its tapering, and shifting the cross section to improve flexibility, safety and cutting efficiency maintenance in the root canals preparation (Elemam et al, 2015; Webber, 2015) In light of this knowledge, it is appropriate to study the usage of these new rotary systems in the endodontic treatment of primary teeth. The null hypothesis is that there is no difference in the capacity of disinfecting the root canals system in primary teeth between the different systems
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