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dc.contributor.authorFLEMING, GARRY
dc.date.accessioned2011-06-07T14:53:53Z
dc.date.available2011-06-07T14:53:53Z
dc.date.issued2011
dc.date.submitted2011en
dc.identifier.citationIsgro G, Addison O, Fleming GJP, Transient and residual stresses induced during the sintering of two dentin ceramics., Dental Materials, 27, 4, 2011, 379 - 285en
dc.identifier.otherY
dc.identifier.urihttp://hdl.handle.net/2262/56463
dc.descriptionPUBLISHEDen
dc.description.abstractObjective: The effect of heat-pressing and subsequent pre-cementation (acid-etching) and resin-cementation operative techniques on the development of transient and residual stresses in different thicknesses of a lithium disilicate glass-ceramic were characterised using profilometry prior to biaxial flexure strength (BFS) determination. Methods: 60 IPS e.max Press discs were pressed and divested under controlled conditions. The discs were polished on one surface to thicknesses of 0.61 ? 0.05, 0.84 ? 0.08, and 1.06 ? 0.07 mm (Groups A-C, respectively). The mean of the maximum deflection (acid-etching and resin-coating was determined using high resolution profilometery prior to BFS testing. Paired sample t-tests were performed (P < 0.05) on the 20 individual samples in each group (Groups A-C) for each comparison. Differences between the baseline quantification and resin-cement coating deflection values and BFS values for Groups A-C were determined using a one-way ANOVA with post-hoc Tukey tests (P < 0.05). Results: Baseline quantification for Groups A-C identified no significant differences between the group means of the maximum deflection values (p = 0.341). Following HF acid-etching, a significant increase in deflection for all groups (p < 0.001) was identified compared with the baseline quantification. Additionally, resin-cement coating significantly increased deflection for Group A (p < 0.001), Group B (p < 0.001) and Group C (p = 0.001) specimens for the individual groups. The increased deflection from baseline quantification to resin-cement coating was significantly different (p < 0.001) for the three specimen thicknesses, although the BFS values were not. Significance: The lower reported baseline quantification range of the mean of the maximum deflection for the IPS e.max? Press specimens was predominantly the result of specimen polishing regime inducing a tensile stress state across the surface defect integral which accounted for the observed surface convexity. Acid-etching and resin-cementation had a significant impact on the development and magnitude of the transient and residual stresses in the lithium disilicate glass-ceramic investigated.en
dc.format.extent379en
dc.format.extent285en
dc.language.isoenen
dc.publisherElsevieren
dc.relation.ispartofseriesDental Materials;
dc.relation.ispartofseries27;
dc.relation.ispartofseries4;
dc.rightsYen
dc.subjectDentistryen
dc.subjectOral Biosciencesen
dc.subjectglass-ceramicen
dc.subjectransient and residual stressesen
dc.titleTransient and residual stresses induced during the sintering of two dentin ceramics.en
dc.typeJournal Articleen
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/flemingg
dc.identifier.rssinternalid71575
dc.identifier.rssurihttp://dx.doi.org/10.1016/j.dental.2010.11.018en


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