Document Detail

Effect of Er:YAG laser treatment on the microstructure of the dentin/adhesive interface after acid-base challenge.
MedLine Citation:
PMID:  18265708     Owner:  NLM     Status:  MEDLINE    
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.
Ahmed Samir Bakry; Alireza Sadr; Go Inoue; Masayuki Otsuki; Junji Tagami
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The journal of adhesive dentistry     Volume:  9     ISSN:  1461-5185     ISO Abbreviation:  J Adhes Dent     Publication Date:  2007 Dec 
Date Detail:
Created Date:  2008-02-12     Completed Date:  2008-04-10     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100888552     Medline TA:  J Adhes Dent     Country:  England    
Other Details:
Languages:  eng     Pagination:  513-20     Citation Subset:  D    
Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
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MeSH Terms
Carbon Compounds, Inorganic / chemistry
Dental Bonding
Dental Debonding
Dental Etching / methods
Dental Polishing
Dentin / surgery,  ultrastructure*
Dentin-Bonding Agents / chemistry*
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
Reg. No./Substance:
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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