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Resistance of bonded premolars to four artificial ageing models post enamel conditioning with a novel calcium-phosphate paste

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Resistance of bonded premolars to four artificial ageing models post enamel conditioning with a novel calcium-phosphate paste

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dc.contributor.author Ibrahim, Ali I. es
dc.contributor.author Al-Hasani, Noor R. es
dc.contributor.author Thompson, Van P. es
dc.contributor.author Deb, Sanjukta es
dc.date.accessioned 2020-10-22T11:50:48Z
dc.date.available 2020-10-22T11:50:48Z
dc.date.issued 2020 es
dc.identifier.citation Ibrahim, Ali I. ; Al-Hasani, Noor R. ; Thompson, Van P. ; Deb, Sanjukta. Resistance of bonded premolars to four artificial ageing models post enamel conditioning with a novel calcium-phosphate paste. En: Journal of Clinical and Experimental Dentistry, 12 4 2020: 317-326 es
dc.identifier.uri https://hdl.handle.net/10550/76024
dc.description.abstract Background: This in vitro study compares a novel calcium-phosphate etchant paste to conventional 37% phospho-ric acid gel for bonding metal and ceramic brackets by evaluating the shear bond strength, remnant adhesive and enamel damage following water storage, acid challenge and fatigue loading. Material and Methods: Metal and ceramic brackets were bonded to 240 extracted human premolars using two ena-mel conditioning protocols: conventional 37% phosphoric acid (PA) gel (control), and an acidic calcium-phosphate (CaP) paste. The CaP paste was prepared from ?-tricalcium phosphate and monocalcium phosphate monohydrate powders mixed with 37% phosphoric acid solution, and the resulting phase was confirmed using FTIR. The bonded premolars were exposed to four artificial ageing models to examine the shear bond strength (SBS), adhesive rem-nant index (ARI score), with stereomicroscopic evaluation of enamel damage. Results: Metal and ceramic control subgroups yielded significantly higher (p ? 0.05) SBS (17.1-31.8 MPa) than the CaP subgroups (11.4-23.8 MPa) post all artificial ageing protocols, coupled with higher ARI scores and evidence of enamel damage. In contrast, the CaP subgroups survived all artificial ageing tests by maintaining adequate SBS for clinical performance, with the advantages of leaving unblemished enamel surface and bracket failures at the enamel-adhesive interface. Conclusions: Enamel conditioning with acidic CaP pastes attained adequate bond strengths with no or minimal adhesive residue and enamel damage, suggesting a suitable alternative to the conventional PA gel for orthodontic bonding. es
dc.title Resistance of bonded premolars to four artificial ageing models post enamel conditioning with a novel calcium-phosphate paste es
dc.type journal article es_ES
dc.subject.unesco UNESCO::CIENCIAS MÉDICAS es
dc.identifier.doi 10.4317/jced.56764 es
dc.type.hasVersion VoR es_ES

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