Brazilian Journal of Oral Sciences
Piracicaba Dental School - UNICAMP
Vol. 10, No. 2, 2011, pp. 136-139
Bioline Code: os11027
Full paper language: English
Document type: Research Article
Document available free of charge
Brazilian Journal of Oral Sciences, Vol. 10, No. 2, 2011, pp. 136-139
© Copyright 2011 Braz J Oral Sci.
Apical and cervical displacement produced by hand and engine-driven stainless steel and nickel-titanium instruments in simulated curved root canal|
Miranzi, Benito André Silveira; Borges, Gilberto Antônio; Miranzi, Almir José Silveira; de Menezes, Fernando Hueb; Miranzi, Mário Alfredo Silveira & Borges, Luis Henrique
Aim: The purpose of this study was evaluate the occurrence of displacement on the apical and cervical thirds of artificial curved root canals with 30° of curvature,comparing the use of stainless steel hand and oscillatory files with nickel-titanium(NI-TI) hand, rotary and oscillatory files.
Methods: Seventy artificial curved root canals were divided into 7 groups (n=10). All canals were prepared with sizes 15 to 40 instruments at the working length according to a crown-down technique.The amount of material removed in the curved portion of the simulated canals at 2 mm level outside and 11 mm inside was measured. Data were analyzed statistically by ANOVA and Tukey’s test (p<0.05).
Results: There was statistically significant differences (p<0.05) at 2 mm level between NI-TI and steel stainless groups. At 11 mm, statistically significant differences (p<0.05) were observed between the groups that used rotary systems (5 and 6) and the remaining groups. The most centered preparations were those belonging to groups 5 and 6, at both levels. Root canal preparation with NI-TI files yielded better results than the stainless steel files especially when mechanically activated.
root canal preparation, endodontic instruments, root canal therapy.
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