| Effect of Er:YAG laser treatment on the microstructure of the dentin/adhesive interface after acid-base challenge. | |
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MedLine Citation:
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PMID: 18265708 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: The aim of this study was to evaluate the effect of Er:YAG laser ablation on the microstructure of the dentin/adhesive interface after acid-base challenge in vitro. MATERIALS AND METHODS: Thirty-two extracted third molars were used. One pair of disk-shaped specimens was obtained from the midcoronal dentin of each tooth. One surface in each pair was subjected to Er:YAG laser irradiation, while the other was ground using 600-grit SiC abrasive paper. The specimens were assigned to 4 groups with 8 pairs in each group. A self-etching primer (Clearfil SE-Bond), a bonding adhesive (Clearfil SE-Bond), and a photocuring composite (Clearfil AP-X) were applied accordingto manufacturer's instructionsto create dentin-resin "sandwiches" of each pair, except in group IV, where no primer was applied. The specimens were stored in demineralizing solution for 20 min in groups I and IV, 60 min in group II, and 120 min in group III. After immersion in 5% NaOCl, all the specimens were polished and argon-ion etched. Finally, the interfaces between the dentin and bonding agent were observed under a scanning electron microscope. RESULTS: All specimens in groups I to III showed an acid-base resistant zone, except those of group IV, which debonded completely. A statistically significant difference was found in the thickness of the acid-base resistant zone between group I vs groups II and III for both abraded and Er:YAG-irradiated surfaces. There was no statistically significant difference in the thickness of the acid-base resistant zone between groups II and III for both conventionally prepared and Er:YAG-irradiated surfaces. CONCLUSION: The existence of an acid-base resistant zone followingthe application of the SE Bond system on both abraded and Er:YAG-lased human dentin, regardless of the acid-base challenge duration, was confirmed. |
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Authors:
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Ahmed Samir Bakry; Alireza Sadr; Go Inoue; Masayuki Otsuki; Junji Tagami |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The journal of adhesive dentistry Volume: 9 ISSN: 1461-5185 ISO Abbreviation: J Adhes Dent Publication Date: 2007 Dec |
Date Detail:
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Created Date: 2008-02-12 Completed Date: 2008-04-10 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 100888552 Medline TA: J Adhes Dent Country: England |
Other Details:
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Languages: eng Pagination: 513-20 Citation Subset: D |
Affiliation:
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Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan. bakry.ope@tmd.ac.jp |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Carbon Compounds, Inorganic
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chemistry Dental Bonding Dental Debonding Dental Etching / methods Dental Polishing Dentin / surgery, ultrastructure* Dentin-Bonding Agents / chemistry* Humans Laser Therapy* Lasers, Gas Lasers, Solid-State / therapeutic use* Materials Testing Methacrylates / chemistry Microscopy, Electron, Scanning Resin Cements / chemistry Silicon Compounds / chemistry Sodium Hypochlorite / chemistry Surface Properties Tooth Demineralization / pathology, surgery |
| Chemical | |
Reg. No./Substance:
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0/Carbon Compounds, Inorganic; 0/Clearfil AP-X; 0/Clearfil SE Bond; 0/Dentin-Bonding Agents; 0/Methacrylates; 0/Resin Cements; 0/Silicon Compounds; 409-21-2/silicon carbide; 7681-52-9/Sodium Hypochlorite |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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