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Conference Paper: Novel Primers for Dental amalgam Repair

TitleNovel Primers for Dental amalgam Repair
Authors
KeywordsAdhesion
Amalgams
Composites
Dental materials
Silane
Issue Date2012
PublisherInternational Association for Dental Research.
Citation
The 26th Annual Scientific Meeting of the International Association for Dental Research South-East Asia Division (IADR-SEA), Hong Kong, China, 3-4 November 2012. How to Cite?
AbstractObjectives: Replacement procedure might be a feasible treatment option if dental amalgam restoration is defected. However, such a procedure is invasive and could generate Hg aerosols, which are harmful to dental team and patients. Thus, repair of dental amalgam by bonding with a resin composite and primers might be a better alternative. Nevertheless, the commercial primers do not produce promising results on resin composite-amalgam bonding. Therefore, the objective in this laboratory study is to develop workable novel primers to bond resin composite better with amalgam. Methods: 3 silanes, 3-acryloxypropyltrimethoxysilane (ACPS), bis-1,2-(triethoxysilyl)ethane (BTSE) and bis[3-(trimethoxysilyl)propyl]amine (BTMA), were used as novel primers with the following combinations: 1.0 vol% ACPS, 1.0 vol% ACPS + 0.5 vol% BTSE, 1.0 vol% ACPS + 0.5 vol% BTMA. These primers were applied on sand-blasted and silica-coated dental amalgam discs. A flowable resin composite was adhered onto the discs and shear bond strength (SBS) was measured at initial, after water storage (1 day, 1 week, 1 month and 3 months) and after thermocycling (1000, 3000 and 6000 cycles). Failure modes were classified. 2-way ANOVA was used to analyze the statistical difference. Results: The initial SBS were 20.22 MPa for ACPS, 16.59 MPa for ACPS + BTSE, and 19.47 MPa for ACPS + BTMA. After 1 week water storage or 1000 cycles of thermocycling, the SBS remained stable, and decreased gradually with linearity in the rest of longer duration groups. After thermocycling, ACPS and ACPS + BTSE showed statistically higher SBS than ACPS + BTMA (p < 0.001); no statistically significance (p = 0.062) were found between these silanes after water storage. No cohesive failure were found within the resin composite; cohesive failure within amalgam and mixed failure were mostly observed. Conclusions: Novel silane primers might be future repair materials which could enhance the resin composite-amalgam bonding.
DescriptionDental Materials Session: no. 168915
Persistent Identifierhttp://hdl.handle.net/10722/180199

 

DC FieldValueLanguage
dc.contributor.authorJin, Xen_US
dc.contributor.authorTsoi, KHen_US
dc.contributor.authorMatinlinna, JPen_US
dc.date.accessioned2013-01-21T01:33:25Z-
dc.date.available2013-01-21T01:33:25Z-
dc.date.issued2012en_US
dc.identifier.citationThe 26th Annual Scientific Meeting of the International Association for Dental Research South-East Asia Division (IADR-SEA), Hong Kong, China, 3-4 November 2012.en_US
dc.identifier.urihttp://hdl.handle.net/10722/180199-
dc.descriptionDental Materials Session: no. 168915-
dc.description.abstractObjectives: Replacement procedure might be a feasible treatment option if dental amalgam restoration is defected. However, such a procedure is invasive and could generate Hg aerosols, which are harmful to dental team and patients. Thus, repair of dental amalgam by bonding with a resin composite and primers might be a better alternative. Nevertheless, the commercial primers do not produce promising results on resin composite-amalgam bonding. Therefore, the objective in this laboratory study is to develop workable novel primers to bond resin composite better with amalgam. Methods: 3 silanes, 3-acryloxypropyltrimethoxysilane (ACPS), bis-1,2-(triethoxysilyl)ethane (BTSE) and bis[3-(trimethoxysilyl)propyl]amine (BTMA), were used as novel primers with the following combinations: 1.0 vol% ACPS, 1.0 vol% ACPS + 0.5 vol% BTSE, 1.0 vol% ACPS + 0.5 vol% BTMA. These primers were applied on sand-blasted and silica-coated dental amalgam discs. A flowable resin composite was adhered onto the discs and shear bond strength (SBS) was measured at initial, after water storage (1 day, 1 week, 1 month and 3 months) and after thermocycling (1000, 3000 and 6000 cycles). Failure modes were classified. 2-way ANOVA was used to analyze the statistical difference. Results: The initial SBS were 20.22 MPa for ACPS, 16.59 MPa for ACPS + BTSE, and 19.47 MPa for ACPS + BTMA. After 1 week water storage or 1000 cycles of thermocycling, the SBS remained stable, and decreased gradually with linearity in the rest of longer duration groups. After thermocycling, ACPS and ACPS + BTSE showed statistically higher SBS than ACPS + BTMA (p < 0.001); no statistically significance (p = 0.062) were found between these silanes after water storage. No cohesive failure were found within the resin composite; cohesive failure within amalgam and mixed failure were mostly observed. Conclusions: Novel silane primers might be future repair materials which could enhance the resin composite-amalgam bonding.-
dc.languageengen_US
dc.publisherInternational Association for Dental Research.-
dc.relation.isformatofAnnual Scientific Meeting of the International Association for Dental Research South-East Asia Division (IADR-SEA 2012)-
dc.subjectAdhesion-
dc.subjectAmalgams-
dc.subjectComposites-
dc.subjectDental materials-
dc.subjectSilane-
dc.titleNovel Primers for Dental amalgam Repairen_US
dc.typeConference_Paperen_US
dc.identifier.emailTsoi, KH: jkhtsoi@hkucc.hku.hken_US
dc.identifier.emailMatinlinna, JP: jpmat@hku.hken_US
dc.identifier.authorityTsoi, KH=rp01609en_US
dc.identifier.authorityMatinlinna, JP=rp00052en_US
dc.identifier.hkuros212883en_US
dc.publisher.placeUnited States-

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