Abstract:
INTRODUCTION:The purpose of this study was to examine the level of erosion in root dentin caused by different irrigation methods and protocols. METHODS:Thirty-five extracted upper molar teeth were instrumented and divided into 7 groups to undergo treatment by different methods: negative control, GentleWave System (Sonendo Inc, Laguna Hills, CA), and syringe needle irrigation following different protocols. The teeth were instrumented to size #25/.08 or #30/.09 for needle irrigation groups and to ProTaper size S1 for the GentleWave group under 5% sodium hypochlorite (NaOCl). The needle irrigation groups were subjected to final rinses of 2 minutes of 3% NaOCl + 2 minutes of 8% EDTA (3% N2 + 8% E2), 2 minutes of 3% NaOCl + 2 minutes of 8% EDTA + 1 minute of 3% NaOCl (3% N2 + 8% E2 + 3% N1), 2 minutes of 5% NaOCl + 2 minutes of 17% EDTA (5% N2 + 17% E2), 2 minutes of 5% NaOCl + 2 minutes of 17% EDTA + 1 minute of 5% NaOCl (5% N2 + 17% E2 + 5% N1), and 5 minutes of 5% NaOCl + 5 minutes of 17% EDTA + 5 minutes of 5% NaOCl (5% N5 + 17% E5 + 5% N5), respectively. The root canal surface was observed by scanning electron microscopy, and the dentin composition was analyzed by continuous line scanning for 300 μm into dentin using energy-dispersive X-ray spectroscopy. RESULTS:A slight but statistically significant decrease of calcium and an increase of carbon was measured in the 5% N2 + 17% E2 group in comparison with the control; no significant difference was found among GentleWave, 3% N2 + 8% E2, and 5% N2 + 17% E2 (P > .05). A final 1-minute rinse with 3% or 5% NaOCl reduced calcium and phosphorus to a significantly lower level than in groups without a 1-minute final rinse (P < .05). Final irrigation with 5% NaOCl for 5 minutes removed almost all calcium and phosphorus. Scanning electron microscopy showed canal wall erosion when an additional final irrigation with NaOCl was done. CONCLUSIONS:NaOCl followed by final EDTA irrigation performed either by syringe needle or the GentleWave System caused minimal dentin erosion. Erosion was measured as increased loss of calcium and phosphorus in samples in which additional final irrigation was performed using NaOCl after EDTA.
journal_name
J Endodjournal_title
Journal of endodonticsauthors
Wang Z,Maezono H,Shen Y,Haapasalo Mdoi
10.1016/j.joen.2016.07.024subject
Has Abstractpub_date
2016-12-01 00:00:00pages
1834-1839issue
12eissn
0099-2399issn
1878-3554pii
S0099-2399(16)30483-6journal_volume
42pub_type
杂志文章abstract::Immunopathologic reactions play a significant role in inflammatory diseases of dental pulp. Interleukin-1beta (IL-1beta) is recognized as a key player in mediating cellular immune response. In this study, we measured the content of IL-1beta and its effect on collagen synthesis in cultures of fibroblasts derived from h...
journal_title:Journal of endodontics
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更新日期:2016-05-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章,随机对照试验
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更新日期:2018-03-01 00:00:00
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doi:10.1016/S0099-2399(98)80028-9
更新日期:1998-06-01 00:00:00
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journal_title:Journal of endodontics
pub_type: 杂志文章
doi:10.1016/j.joen.2016.06.017
更新日期:2016-09-01 00:00:00
abstract:INTRODUCTION:Resin-based dental materials contain various diluent monomers that can interfere with vascular function by causing vasodilation. In this study, we evaluated the vasoactive potential of hydroxyethyl methacrylate (HEMA) and triethylene glycol dimethacrylate (TEGDMA) and the possible mechanism of their vascul...
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doi:10.1016/j.joen.2010.11.038
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pub_type: 杂志文章
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更新日期:2011-08-01 00:00:00
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pub_type: 杂志文章
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更新日期:2020-02-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2016-07-01 00:00:00
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更新日期:2011-09-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/j.joen.2010.11.012
更新日期:2011-02-01 00:00:00
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