Deformation of a dental ceramic following adhesive cementation.

Hdl Handle:
http://hdl.handle.net/10147/124117
Title:
Deformation of a dental ceramic following adhesive cementation.
Authors:
Isgró, G; Addison, O; Fleming, G J P
Affiliation:
Materials Science Unit, Division of Oral Biosciences, Dublin Dental School & Hospital, Trinity College Dublin, Lincoln Place, Dublin 2, Ireland. giuseppe.isgro@dental.tcd.ie
Citation:
Deformation of a dental ceramic following adhesive cementation. 2010, 89 (1):87-90 J. Dent. Res.
Journal:
Journal of dental research
Issue Date:
Jan-2010
URI:
http://hdl.handle.net/10147/124117
DOI:
10.1177/0022034509354049
PubMed ID:
19948940
Abstract:
Stress-induced changes imparted in a 'dentin-bonded-crown' material during sintering, annealing, pre-cementation surface modification, and resin coating have been visualized by profilometry. The hypothesis tested was that operative techniques modify the stressing pattern throughout the material thickness. We polished the upper surfaces of 10 ceramic discs to remove surface imperfections before using a contact profilometer (40-nm resolution) to measure the 'flatness'. Discs were re-profiled after annealing and after alumina particle air-abrasion and resin-coating of the 'fit' surface. Polished surfaces were convex, with a mean deflection of 8.4 + or - 1.5 microm. Mean deflection was significantly reduced (P = 0.029) following alumina particle air-abrasion and increased (P < 0.001) on resin-coating. Polishing induced a tensile stress state, resulting in surface convexity. Alumina particle air-abrasion reduced the relative tensile stress state of the contralateral polished surface. Resin-polymerization generated compression within the resin-ceramic 'hybrid layer' and tension in the polished surface and is likely to contribute to the strengthening of ceramics by resin-based cements.
Item Type:
Article
Language:
en
MeSH:
Analysis of Variance; Crowns; Dental Bonding; Dental Cements; Dental Marginal Adaptation; Dental Polishing; Dental Porcelain; Dental Restoration Failure; Dental Restoration, Permanent; Dental Stress Analysis; Elasticity; Humans; Materials Testing; Statistics, Nonparametric; Stress, Mechanical; Tensile Strength
ISSN:
1544-0591

Full metadata record

DC FieldValue Language
dc.contributor.authorIsgró, Gen
dc.contributor.authorAddison, Oen
dc.contributor.authorFleming, G J Pen
dc.date.accessioned2011-03-10T14:09:39Z-
dc.date.available2011-03-10T14:09:39Z-
dc.date.issued2010-01-
dc.identifier.citationDeformation of a dental ceramic following adhesive cementation. 2010, 89 (1):87-90 J. Dent. Res.en
dc.identifier.issn1544-0591-
dc.identifier.pmid19948940-
dc.identifier.doi10.1177/0022034509354049-
dc.identifier.urihttp://hdl.handle.net/10147/124117-
dc.description.abstractStress-induced changes imparted in a 'dentin-bonded-crown' material during sintering, annealing, pre-cementation surface modification, and resin coating have been visualized by profilometry. The hypothesis tested was that operative techniques modify the stressing pattern throughout the material thickness. We polished the upper surfaces of 10 ceramic discs to remove surface imperfections before using a contact profilometer (40-nm resolution) to measure the 'flatness'. Discs were re-profiled after annealing and after alumina particle air-abrasion and resin-coating of the 'fit' surface. Polished surfaces were convex, with a mean deflection of 8.4 + or - 1.5 microm. Mean deflection was significantly reduced (P = 0.029) following alumina particle air-abrasion and increased (P < 0.001) on resin-coating. Polishing induced a tensile stress state, resulting in surface convexity. Alumina particle air-abrasion reduced the relative tensile stress state of the contralateral polished surface. Resin-polymerization generated compression within the resin-ceramic 'hybrid layer' and tension in the polished surface and is likely to contribute to the strengthening of ceramics by resin-based cements.-
dc.language.isoenen
dc.subject.meshAnalysis of Variance-
dc.subject.meshCrowns-
dc.subject.meshDental Bonding-
dc.subject.meshDental Cements-
dc.subject.meshDental Marginal Adaptation-
dc.subject.meshDental Polishing-
dc.subject.meshDental Porcelain-
dc.subject.meshDental Restoration Failure-
dc.subject.meshDental Restoration, Permanent-
dc.subject.meshDental Stress Analysis-
dc.subject.meshElasticity-
dc.subject.meshHumans-
dc.subject.meshMaterials Testing-
dc.subject.meshStatistics, Nonparametric-
dc.subject.meshStress, Mechanical-
dc.subject.meshTensile Strength-
dc.titleDeformation of a dental ceramic following adhesive cementation.en
dc.typeArticleen
dc.contributor.departmentMaterials Science Unit, Division of Oral Biosciences, Dublin Dental School & Hospital, Trinity College Dublin, Lincoln Place, Dublin 2, Ireland. giuseppe.isgro@dental.tcd.ieen
dc.identifier.journalJournal of dental researchen
dc.description.provinceLeinster-

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