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Article: The influence of cross-sectional shape and surface area on the microtensile bond test

TitleThe influence of cross-sectional shape and surface area on the microtensile bond test
Authors
KeywordsChemicals And Cas Registry Numbers
Issue Date1998
PublisherElsevier Inc. The Journal's web site is located at http://www.elsevier.com/locate/dental
Citation
Dental Materials, 1998, v. 14 n. 3, p. 212-221 How to Cite?
AbstractObjectives. The purpose of this study was to determine the effect of the cross-sectional area shape (cylindrical vs. rectangular) and the bonding surface area on the microtensile bond strengths and stress distribution of four dentin adhesive systems (Scotchbond MP Plus, OptiBond FL, OptiBond Solo, One-Step). In addition, finite element analysis (FEA) models were developed to investigate stress distributions. Methods. Extracted human molars were cut vertically and the occlusal enamel removed; one-half of the tooth was used for rectangular specimens, the other half for cylindrical specimens. The occlusal dentin was bonded according to the manufacturers' directions and covered with a block of resin composite. For the cylindrical specimens, the bonded dentin was shaped with a diamond bur on a lathe to produce specimens of area 1.1, 1.5 or 3.1 mm2 at the bonded interface. The rectangular specimens were sectioned to obtain bar-shaped specimens, which were shaped to produce hour-glass shaped specimens with the same area as the round specimens. Bonds were stressed in tension at a speed of 1 mm min-1. The mean bond strengths were compared using two-way ANOVA, one-way ANOVA, LSD and Student's t tests. The fractured surfaces were examined by scanning electron microscopy, and the frequencies of the fracture modes were compared using the Kruskal-Wallis and Mann-Whitney U tests. FEA models were created simulating the cross-sectional areas for bonding to determine the stress distribution. Results. The 3.1 mm2 bonding area groups showed significantly lower bond strengths than the 1.1 mm2 bonding area groups (p < 0.05), except for the rectangular specimens using Scotchbond MP Plus and One-Step. Most cylindrical specimens of bonding area 1.1 or 1.5 mm2 exhibited adhesive failure at the interface between the dentin and the adhesive resin. No differences were determined between cylindrical and rectangular specimens. The fracture mode matched the stress distribution patterns calculated from the FEA modeling. Significance. The results indicate that the test methods using small surface areas produce higher bond strengths than those using larger surface areas, and that cross-sectional shape has little effect. This is probably a result of fewer defects occurring in the small-area specimens. © 1998 Published by Elsevier Science Ltd on behalf of the Academy of Dental Materials.
Persistent Identifierhttp://hdl.handle.net/10722/90729
ISSN
2015 Impact Factor: 3.931
2015 SCImago Journal Rankings: 1.339
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorPhrukkanon, Sen_HK
dc.contributor.authorBurrow, MFen_HK
dc.contributor.authorTyas, MJen_HK
dc.date.accessioned2010-09-17T10:07:25Z-
dc.date.available2010-09-17T10:07:25Z-
dc.date.issued1998en_HK
dc.identifier.citationDental Materials, 1998, v. 14 n. 3, p. 212-221en_HK
dc.identifier.issn0109-5641en_HK
dc.identifier.urihttp://hdl.handle.net/10722/90729-
dc.description.abstractObjectives. The purpose of this study was to determine the effect of the cross-sectional area shape (cylindrical vs. rectangular) and the bonding surface area on the microtensile bond strengths and stress distribution of four dentin adhesive systems (Scotchbond MP Plus, OptiBond FL, OptiBond Solo, One-Step). In addition, finite element analysis (FEA) models were developed to investigate stress distributions. Methods. Extracted human molars were cut vertically and the occlusal enamel removed; one-half of the tooth was used for rectangular specimens, the other half for cylindrical specimens. The occlusal dentin was bonded according to the manufacturers' directions and covered with a block of resin composite. For the cylindrical specimens, the bonded dentin was shaped with a diamond bur on a lathe to produce specimens of area 1.1, 1.5 or 3.1 mm2 at the bonded interface. The rectangular specimens were sectioned to obtain bar-shaped specimens, which were shaped to produce hour-glass shaped specimens with the same area as the round specimens. Bonds were stressed in tension at a speed of 1 mm min-1. The mean bond strengths were compared using two-way ANOVA, one-way ANOVA, LSD and Student's t tests. The fractured surfaces were examined by scanning electron microscopy, and the frequencies of the fracture modes were compared using the Kruskal-Wallis and Mann-Whitney U tests. FEA models were created simulating the cross-sectional areas for bonding to determine the stress distribution. Results. The 3.1 mm2 bonding area groups showed significantly lower bond strengths than the 1.1 mm2 bonding area groups (p < 0.05), except for the rectangular specimens using Scotchbond MP Plus and One-Step. Most cylindrical specimens of bonding area 1.1 or 1.5 mm2 exhibited adhesive failure at the interface between the dentin and the adhesive resin. No differences were determined between cylindrical and rectangular specimens. The fracture mode matched the stress distribution patterns calculated from the FEA modeling. Significance. The results indicate that the test methods using small surface areas produce higher bond strengths than those using larger surface areas, and that cross-sectional shape has little effect. This is probably a result of fewer defects occurring in the small-area specimens. © 1998 Published by Elsevier Science Ltd on behalf of the Academy of Dental Materials.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.subjectChemicals And Cas Registry Numbersen_HK
dc.subject.meshAnalysis of Varianceen_HK
dc.subject.meshDental Bondingen_HK
dc.subject.meshDental Stress Analysisen_HK
dc.subject.meshDentin-Bonding Agentsen_HK
dc.subject.meshFinite Element Analysisen_HK
dc.subject.meshHumansen_HK
dc.subject.meshMaterials Testing - methodsen_HK
dc.subject.meshMethacrylatesen_HK
dc.subject.meshMicroscopy, Electron, Scanningen_HK
dc.subject.meshResin Cementsen_HK
dc.subject.meshStatistics, Nonparametricen_HK
dc.subject.meshTensile Strengthen_HK
dc.titleThe influence of cross-sectional shape and surface area on the microtensile bond testen_HK
dc.typeArticleen_HK
dc.identifier.emailBurrow, MF:mfburr58@hku.hken_HK
dc.identifier.authorityBurrow, MF=rp01306en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.pmid10196798-
dc.identifier.scopuseid_2-s2.0-0032082021en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0032082021&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume14en_HK
dc.identifier.issue3en_HK
dc.identifier.spage212en_HK
dc.identifier.epage221en_HK
dc.identifier.isiWOS:000077600200007-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridPhrukkanon, S=8837113100en_HK
dc.identifier.scopusauthoridBurrow, MF=7005876730en_HK
dc.identifier.scopusauthoridTyas, MJ=7006088443en_HK

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