Effect of different torques in cyclic fatigue resistance of K3 rotary instruments
Braz. j. oral sci
;
14(2): 122-125, Apr.-June 2015. tab, ilus
Artigo
em Inglês
| LILACS
| ID: lil-755042
ABSTRACT
Aim: To assess the effect of different torque values on cyclic fatigue resistance of K3 rotary nickel-titanium (NiTi) files. Methods: Eighty K3 files, size 25 mm, taper 0.04 were divided in 4 groups according to different torques (0.5, 1, 2 and 6 Ncm) and were submitted to a cyclic fatigue test. This test was performed with a device that allowed the file to rotate inside a stainless steel artificial curved canal, simulating the pecking motion. Files rotated until fracture occurred and time to failure was recorded in seconds with a stopwatch. Data were analyzed by ANOVA and Tukey tests (p<0.05). Results: All groups were compared and only the group of 6 N.cm showed statistically significant difference (p=0.0002). Conclusions: For #25.04 K3 files, the evaluated torques up to 2 N.cm had no influence on cyclic fatigue resistance. Using 6 N.cm torque value resulted in lower resistance to cyclic fatigue.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Preparo de Canal Radicular
/
Torque
/
Instrumentos Odontológicos
/
Endodontia
Idioma:
Inglês
Revista:
Braz. j. oral sci
Assunto da revista:
Odontologia
Ano de publicação:
2015
Tipo de documento:
Artigo
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade Santa Cecília/BR
/
Universidade de São Paulo/BR
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