Abstract:
AIM:To evaluate the effect of citric acid, ethylenediaminetetraacetic acid (EDTA) and ethylenediaminetetraacetic acid plus Cetavlon (EDTAC) solutions on the microhardness of human root canal dentine. METHODOLOGY:Sixteen maxillary human canines were sectioned transversely at the cemento-enamel junction and the crowns were discarded. Subsequently, each root was embedded in an epoxy resin cylinder and their middle third sectioned horizontally into 4 mm thick slices. The samples were randomly divided into three groups according to the chelating agent employed, as follows (n = 6): group 1: EDTA 17%, group 2: EDTAC 17% and group 3: citric acid 10%. Dentine microhardness was then measured with a load of 50 g for 15 s. At the beginning of the experiment, reference microhardness values were obtained for samples without any etching (t = 0 min). The same samples were then exposed to 50 microL of the chelator solution for 1, 3 and 5 min. The Student's t-test (P < 0.05) was used to compare results for different times for each chelator and different chelators for each time. RESULTS:Microhardness decreased with increasing time of application of chelating solutions. There were no significant (P > 0.05) differences between initial microhardness for the three groups as well as after 1 min of application of the substances. After 3 min, EDTA produced a significantly greater reduction in microhardness. However, there was no significant difference between EDTA and EDTAC after 5 min. Citric acid caused significantly less reduction in microhardness. CONCLUSIONS:Overall, citric acid was least effective in reducing dentine hardness whilst EDTA had the strongest effect.
journal_name
Int Endod Jjournal_title
International endodontic journalauthors
De-Deus G,Paciornik S,Mauricio MHdoi
10.1111/j.1365-2591.2006.01094.xsubject
Has Abstractpub_date
2006-05-01 00:00:00pages
401-7issue
5eissn
0143-2885issn
1365-2591pii
IEJ1094journal_volume
39pub_type
杂志文章,随机对照试验abstract:AIM:To investigate the composition of materials and leachate of a hydrated prototype cement composed of tricalcium silicate and radiopacifier and compare this to other tricalcium silicate-based cements (Biodentine and Bioaggregate) to assess whether the additives in the proprietary brand cements affect the hydration of...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1111/iej.12039
更新日期:2013-07-01 00:00:00
abstract:AIM:The aim of this study was to evaluate the diagnostic efficacy of an electronic system for the determination of working length, in comparison with two radiological methods (conventional film and digital radiography). METHODOLOGY:The study sample consisted of 28 root canals belonging to 20 human mandibular teeth. A ...
journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1046/j.1365-2591.2001.00400.x
更新日期:2001-07-01 00:00:00
abstract:AIM:To investigate the influence of biofilm structure on the biofilm removal capacity of endodontic irrigants and to study changes in the architecture of the remaining biofilms. METHODOLOGY:Streptococcus oralis J22 and Actinomyces naeslundii T14V-J1 were cocultured under different growth conditions on saliva-coated hy...
journal_title:International endodontic journal
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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
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doi:10.1111/j.1365-2591.2004.00873.x
更新日期:2004-11-01 00:00:00
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
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journal_title:International endodontic journal
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journal_title:International endodontic journal
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journal_title:International endodontic journal
pub_type: 杂志文章
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更新日期:2018-10-01 00:00:00
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更新日期:2018-12-01 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:1992-11-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章,评审
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更新日期:2018-04-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2021-01-12 00:00:00
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更新日期:2014-06-01 00:00:00
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journal_title:International endodontic journal
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pub_type: 杂志文章
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更新日期:2014-09-01 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:2004-09-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章,随机对照试验
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更新日期:2009-10-01 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:1999-01-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章
doi:10.1046/j.1365-2591.2003.00707.x
更新日期:2003-09-01 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:1997-07-01 00:00:00
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pub_type: 杂志文章
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更新日期:2005-07-01 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:2016-10-01 00:00:00
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journal_title:International endodontic journal
pub_type: 杂志文章,评审
doi:10.1111/j.1365-2591.2003.00754.x
更新日期:2003-12-01 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:2015-06-01 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:2015-06-01 00:00:00