Abstract:
AIM:To evaluate the torsional properties of the NiTi glide path reciprocating instruments R-Pilot (VDW, Munich, Germany) and WaveOne Gold Glider (Dentsply Sirona, Ballaigues, Switzerland). METHODOLOGY:Ten R-Pilot (size 12.5, .04 taper) and 10 WaveOne Gold Glider (size 15, .02v taper) instruments were used. The torque and angle of rotation at failure of new instruments (n = 10) were measured according to ISO 3630-1. Three millimetres of each instrument tip was clamped to a small load cell by a lever arm linked to the torsion axis. The fracture surface of all fragments was examined with a scanning electron microscope. Data were analysed using the Student t-test at a significance level of P < 0.05. RESULTS:The maximum torsional strength of the R-Pilot instruments was greater than the WaveOne Gold Glider (P < 0.05). In contrast, WaveOne Gold Glider instruments had significantly higher angular rotation to fracture than R-Pilot instruments (P < 0.05). The scanning electron microscopy of the fracture surfaces revealed similar and typical features of torsional failure (ductile type) for both brands. The torsional failure displayed two zones: the first with microvoids in the centre of the instruments (core) and the second one represented by plastic deformation around the microvoids; this configuration occurred because of the shear stresses originated during the twisting. CONCLUSIONS:R-Pilot instruments had a lower angle of rotation to fracture but a higher torque to failure than WaveOne Gold Glider instruments.
journal_name
Int Endod Jjournal_title
International endodontic journalauthors
Santos CB,Simões-Carvalho M,Perez R,Vieira VTL,Antunes HS,Cavalcante DF,De-Deus G,Silva EJNLdoi
10.1111/iej.13068subject
Has Abstractpub_date
2019-06-01 00:00:00pages
874-879issue
6eissn
0143-2885issn
1365-2591journal_volume
52pub_type
杂志文章abstract:AIM:To assess and compare the mechanical properties of TRUShape (TRS) with several nickel-titanium rotary instruments. METHODOLOGY:Cyclic fatigue, torsional resistance, flexibility and surface microhardness of TRS (size 25, 0.06v taper), ProTaper Next X2 (PTN X2, size 25, 0.06 taper), ProTaper Gold (PTG F2; size 25, 0...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.12700
更新日期:2017-08-01 00:00:00
abstract:AIM:To determine retrospectively the long-term radiographic outcome of root canal treatments and root canal retreatments with unintentional root canal overfilling. METHODOLOGY:A total of 220 root canal treatments (143 primary/77 retreatments) with postoperative unintentional canal overfilling and performed by two endo...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.13209
更新日期:2020-01-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2005.00938.x
更新日期:2005-06-01 00:00:00
abstract:AIM:To evaluate the percentage volume of voids within cement layers, to determine the push-out bond strength of circular and oval fibre posts luted with different commercial resin cements in oval cross-sectional root canals, and to correlate push-out bond strength values and volume of voids of circular and oval fibre p...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.12568
更新日期:2016-12-01 00:00:00
abstract::This case report highlights the diagnostic challenge that herpes zoster represents if pain develops in the prodromal stage. A 58-year-old male presented with pain in the left maxilla. The symptoms had lasted for 7 months. The first premolar had been extracted soon after the onset, and the second premolar root filled s...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1046/j.1365-2591.2002.00605.x
更新日期:2002-12-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章,随机对照试验
doi:10.1111/iej.12046
更新日期:2013-07-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2006.01068.x
更新日期:2006-03-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章,meta分析,评审
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更新日期:2003-09-01 00:00:00
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journal_title:International endodontic journal
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doi:10.1111/j.1365-2591.2004.00753.x
更新日期:2004-01-01 00:00:00
abstract::The use of cone beam computed tomography (CBCT) in the diagnosis and/or management of endodontic problems is increasing and is reflected in the exponential rise in publications on this topic in the last two decades. The aim of this paper is to: (i) Review current literature on the endodontic applications of CBCT; (ii)...
journal_title:International endodontic journal
pub_type: 杂志文章,评审
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更新日期:2019-08-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
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更新日期:2011-10-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.13027
更新日期:2019-04-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.1989.tb00910.x
更新日期:1989-05-01 00:00:00
abstract:AIM:To evaluate lymphocyte-like cell activation (CD5-positive cells) and the expression of interleukin (IL)-6 and IL-17 in the pulp after tooth bleaching with two concentrations of hydrogen peroxide (H2 O2 ). METHODOLOGY:The right and left maxillary molars from 40 rats were treated randomly with bleaching gel with 20%...
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更新日期:2018-07-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
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更新日期:2014-06-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.13403
更新日期:2021-01-01 00:00:00
abstract::Following extraction of a symptomatic mandibular premolar which had been subjected to two periradicular surgical procedures, significant apical healing was identified histologically. The implications of these findings are discussed in relation to contemporary advocated treatment regimens, case assessment, and interpre...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.1994.tb00280.x
更新日期:1994-11-01 00:00:00
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journal_title:International endodontic journal
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更新日期:2020-11-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
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更新日期:2018-05-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2007.01193.x
更新日期:2007-04-01 00:00:00
abstract::The short-term tissue responses to two potential root-end filling materials, a light-cured glass ionomer cement (Vitrebond) and a reinforced zinc oxide-eugenol cement (Kalzinol), were compared with that to amalgam using a previously devised experimental model. In 24 premolar teeth of beagle dogs (47 roots), a collecti...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1046/j.1365-2591.1997.00077.x
更新日期:1997-07-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.12429
更新日期:2016-01-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
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更新日期:2016-04-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.13407
更新日期:2021-02-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.12029
更新日期:2013-06-01 00:00:00
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journal_title:International endodontic journal
pub_type: 临床试验,杂志文章,随机对照试验
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更新日期:2003-08-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2011.01973.x
更新日期:2012-01-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/j.1365-2591.2009.01589.x
更新日期:2009-09-01 00:00:00