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Article: Micro-tensile bond strengths to sclerotic dentin using a self-etching and a total-etching technique

TitleMicro-tensile bond strengths to sclerotic dentin using a self-etching and a total-etching technique
Authors
Issue Date2002
PublisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/dental
Citation
Dental Materials, 2002, v. 18 n. 5, p. 359-369 How to Cite?
AbstractObjectives: To evaluate the in vitro regional micro-tensile bond strengths of a self-etching/self-priming adhesive system to sclerotic dentin, in the absence or presence of phosphoric acid conditioning. Methods: Naturally-occurring, non-carious cervical lesions on extracted premolars were hand-cleaned with a slurry of pumice and chlorhexidine, then bonded without further cavity preparation. One group was bonded using Clearfil Liner Bond 2V (Kuraray Co. Ltd., Osaka, Japan). The other group was first conditioned with K-etchant; 40% phosphoric acid gel (Kuraray) prior to the application of the self-etching primer. Artificially prepared wedge-shaped cavities were also made in sound premolars and bonded with the two methods as controls. Resin composite build-ups were made using Clearfil Protect Liner F and AP-X resin composite (Kuraray). After storage in water for 24h, the teeth were sectioned into 0.7×0.7mm composite-dentin beams along the occlusal and gingival walls, and at the apex of the lesions. The use of two conditioning methods, two substrate types, and three different locations yielded 10-14 beams for each of the 12 groups. After testing for the μTBS, representative beams that were stressed to failure were examined with SEM. Remaining fractured beams were demineralized and processed for TEM examination. Statistical analysis was performed using a three-way ANOVA and Student-Newman-Keuls tests. Results: Regardless of the conditioning methods, bond strengths to sound dentin were significantly higher than to sclerotic dentin (P< 0.05). With sclerotic dentin, there was no significant difference for the conditioning methods used, except that K-etchant significantly improved the bond strength at the gingival aspect of the lesions. Fractographic analysis revealed that the self-etching primer could not etch beyond the surface hypermineralized layer of sclerotic dentin. Interfacial failure occurred along the surface of the mineralized intermicrobial matrix and/or hypermineralized layer. With the use of phosphoric acid, a hybrid layer was only seen when the surface layers were thin. Incompletely removed sclerotic casts were evident in both groups. Significance: Removal of the surface layers of sclerotic dentin and/or conditioning with stronger acids may be beneficial to obtain stronger bonding to sclerotic dentin. © 2002 Academy of Dental Materials. Published by Elsevier Science Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/66325
ISSN
2015 Impact Factor: 3.931
2015 SCImago Journal Rankings: 1.339
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorKwong, SMen_HK
dc.contributor.authorCheung, GSPen_HK
dc.contributor.authorKei, LHen_HK
dc.contributor.authorItthagarun, Aen_HK
dc.contributor.authorSmales, RJen_HK
dc.contributor.authorTay, FRen_HK
dc.contributor.authorPashley, DHen_HK
dc.date.accessioned2010-09-06T05:45:25Z-
dc.date.available2010-09-06T05:45:25Z-
dc.date.issued2002en_HK
dc.identifier.citationDental Materials, 2002, v. 18 n. 5, p. 359-369en_HK
dc.identifier.issn0109-5641en_HK
dc.identifier.urihttp://hdl.handle.net/10722/66325-
dc.description.abstractObjectives: To evaluate the in vitro regional micro-tensile bond strengths of a self-etching/self-priming adhesive system to sclerotic dentin, in the absence or presence of phosphoric acid conditioning. Methods: Naturally-occurring, non-carious cervical lesions on extracted premolars were hand-cleaned with a slurry of pumice and chlorhexidine, then bonded without further cavity preparation. One group was bonded using Clearfil Liner Bond 2V (Kuraray Co. Ltd., Osaka, Japan). The other group was first conditioned with K-etchant; 40% phosphoric acid gel (Kuraray) prior to the application of the self-etching primer. Artificially prepared wedge-shaped cavities were also made in sound premolars and bonded with the two methods as controls. Resin composite build-ups were made using Clearfil Protect Liner F and AP-X resin composite (Kuraray). After storage in water for 24h, the teeth were sectioned into 0.7×0.7mm composite-dentin beams along the occlusal and gingival walls, and at the apex of the lesions. The use of two conditioning methods, two substrate types, and three different locations yielded 10-14 beams for each of the 12 groups. After testing for the μTBS, representative beams that were stressed to failure were examined with SEM. Remaining fractured beams were demineralized and processed for TEM examination. Statistical analysis was performed using a three-way ANOVA and Student-Newman-Keuls tests. Results: Regardless of the conditioning methods, bond strengths to sound dentin were significantly higher than to sclerotic dentin (P< 0.05). With sclerotic dentin, there was no significant difference for the conditioning methods used, except that K-etchant significantly improved the bond strength at the gingival aspect of the lesions. Fractographic analysis revealed that the self-etching primer could not etch beyond the surface hypermineralized layer of sclerotic dentin. Interfacial failure occurred along the surface of the mineralized intermicrobial matrix and/or hypermineralized layer. With the use of phosphoric acid, a hybrid layer was only seen when the surface layers were thin. Incompletely removed sclerotic casts were evident in both groups. Significance: Removal of the surface layers of sclerotic dentin and/or conditioning with stronger acids may be beneficial to obtain stronger bonding to sclerotic dentin. © 2002 Academy of Dental Materials. Published by Elsevier Science Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/dentalen_HK
dc.relation.ispartofDental Materialsen_HK
dc.rightsDental Materials. Copyright © Elsevier Inc.en_HK
dc.subject.meshAcid Etching, Dental - methodsen_HK
dc.subject.meshAnalysis of Varianceen_HK
dc.subject.meshComposite Resinsen_HK
dc.subject.meshDental Bondingen_HK
dc.subject.meshDentin Permeabilityen_HK
dc.subject.meshDentin, Secondaryen_HK
dc.subject.meshDentin-Bonding Agentsen_HK
dc.subject.meshHumansen_HK
dc.subject.meshMaterials Testingen_HK
dc.subject.meshMethacrylatesen_HK
dc.subject.meshMicroscopy, Electronen_HK
dc.subject.meshPhosphoric Acidsen_HK
dc.subject.meshSurface Propertiesen_HK
dc.subject.meshTensile Strengthen_HK
dc.subject.meshTooth Cervixen_HK
dc.titleMicro-tensile bond strengths to sclerotic dentin using a self-etching and a total-etching techniqueen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0109-5641&volume=18&spage=359&epage=369&date=2002&atitle=Micro-tensile+bond+strengths+to+sclerotic+dentin+using+a+self-etching+and+a+total-etching+techniqueen_HK
dc.identifier.emailCheung, GSP:spcheung@hkucc.hku.hken_HK
dc.identifier.authorityCheung, GSP=rp00016en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0109-5641(01)00051-3en_HK
dc.identifier.pmid12175574-
dc.identifier.scopuseid_2-s2.0-0036631675en_HK
dc.identifier.hkuros72188en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0036631675&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume18en_HK
dc.identifier.issue5en_HK
dc.identifier.spage359en_HK
dc.identifier.epage369en_HK
dc.identifier.isiWOS:000176450600001-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridKwong, SM=7005600678en_HK
dc.identifier.scopusauthoridCheung, GSP=7005809531en_HK
dc.identifier.scopusauthoridKei, LH=6602484458en_HK
dc.identifier.scopusauthoridItthagarun, A=6701591745en_HK
dc.identifier.scopusauthoridSmales, RJ=7005372382en_HK
dc.identifier.scopusauthoridTay, FR=7102091962en_HK
dc.identifier.scopusauthoridPashley, DH=35448600800en_HK

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