Abstract:
:The cyclic fatigue resistance of three types of nickel-titanium rotary files was compared in a model using reciprocating axial movement. The influence of file size and taper was also investigated and fracture patterns were examined under SEM. The 10 experimental groups consisted of ProFiles, K3s, and RaCe files, size 25 in .04 and .06 tapers, as well as ProFiles and K3s, size 40 in .04 and .06 tapers. Each file was rotated freely at 300 rpm inside a stainless steel tube with a 60 degree and 5 mm radius of curvature. A continuous 3 mm oscillating axial motion was applied at 1 cycle per second by attaching an electric dental handpiece to the most inferior load cell of an Instron machine using a custom-made jig. The number of rotations to failure was determined and analyzed using analysis of variance and Tukey's post hoc tests. Overall, K3 25/.04 files were significantly more resistant to cyclic fatigue compared to any other group in this study. In the 25/.04 category, K3s were significantly more resistant to failure than ProFiles and RaCe files. Also in the same category, ProFiles significantly outlasted RaCe files. In the 25/.06 group, K3s and ProFiles were significantly more resistant to failure than RaCe files, but K3s were not significantly different than ProFiles. In the 40/.04 and 40/.06 groups, K3s were significantly more resistant to cyclic fatigue than ProFiles. SEM observations demonstrated mostly a ductile mode of fracture. The results suggest that different cross-sectional designs, diameters, and tapers all contribute to a nickel-titanium instrument's vulnerability to cyclic failure.
journal_name
J Endodjournal_title
Journal of endodonticsauthors
Yao JH,Schwartz SA,Beeson TJdoi
10.1016/j.joen.2005.10.013keywords:
subject
Has Abstractpub_date
2006-01-01 00:00:00pages
55-7issue
1eissn
0099-2399issn
1878-3554pii
S0099-2399(05)00053-1journal_volume
32pub_type
杂志文章abstract::The dislocation resistance of root fillings created with MetaSEAL, a self-adhesive 4-META-containing methacrylate resin-based sealer, was evaluated. Forty-six incisors were cleaned and shaped using NaOCl and EDTA as irrigants. They were filled with gutta-percha/MetaSEAL or gutta-percha/AH Plus sealer using either a si...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2008.03.028
更新日期:2008-07-01 00:00:00
abstract:INTRODUCTION:This retrospective study assessed the effects of microsurgical treatment of post-treatment endodontic disease using SuperEBA (Bosworth, Skokie, IL) as the root-end filling material and evaluated the potential prognostic factors in relation to outcome. METHODS:Data were collected from patients diagnosed wi...
journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2013.11.001
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更新日期:2016-02-01 00:00:00
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journal_title:Journal of endodontics
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journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2007.02.009
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journal_title:Journal of endodontics
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更新日期:2010-05-01 00:00:00
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doi:10.1016/j.joen.2019.11.012
更新日期:2020-03-01 00:00:00
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更新日期:2017-02-01 00:00:00
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journal_title:Journal of endodontics
pub_type: 杂志文章
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更新日期:1992-02-01 00:00:00
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更新日期:2016-08-01 00:00:00
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journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2006.12.013
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journal_title:Journal of endodontics
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2002-10-01 00:00:00
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journal_title:Journal of endodontics
pub_type: 杂志文章,收录出版
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更新日期:2008-05-01 00:00:00
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journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2016.09.003
更新日期:2017-01-01 00:00:00
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journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2009.11.008
更新日期:2010-03-01 00:00:00
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journal_title:Journal of endodontics
pub_type: 杂志文章
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更新日期:1991-07-01 00:00:00
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journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2011.06.030
更新日期:2011-10-01 00:00:00
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doi:10.1016/j.joen.2010.10.001
更新日期:2011-01-01 00:00:00
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journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2008.01.022
更新日期:2008-04-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/j.joen.2011.09.030
更新日期:2012-01-01 00:00:00
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pub_type: 杂志文章
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更新日期:2015-01-01 00:00:00
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pub_type: 杂志文章
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更新日期:1989-10-01 00:00:00
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journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2019.09.008
更新日期:2019-12-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/j.joen.2013.07.003
更新日期:2013-11-01 00:00:00