Experimental and Finite Element Study of Residual Thermal Stresses in Veneered Y-TZP Structures

Simple item page
dc.contributor.authorTanaka, Carina B.
dc.contributor.authorHarisha, Hossam
dc.contributor.authorBaldassarri, Marta
dc.contributor.authorWolff, Mark S.
dc.contributor.authorTong, Hui
dc.contributor.authorMeira, Josete B.C.
dc.contributor.authorZhang, Yu
dc.date2023-05-18T00:19:59.000
dc.date.accessioned2023-05-22T13:13:20Z
dc.date.available2023-05-22T13:13:20Z
dc.date.issued2016-05-15
dc.date.submitted2021-01-12T11:06:03-08:00
dc.description.abstractThe main complications of zirconia-based laminated systems are chipping and delamination of veneering porcelain, which has been found to be directly associated with the development of residual thermal stresses in the porcelain layer. This study investigates the effects of cooling rate and specimen geometry on the residual stress states in porcelain-veneered zirconia structures. Bilayers of three different shapes (bars, semi-cylindrical shells, and arch-cubic structures) with 1.5 mm and 0.7 mm thickness of dentin porcelain and zirconia framework, respectively, were subjected to two cooling protocols: slow cooling (SC) at 32 °C/min and extremely-slow cooling (XSC) at 2 °C/min. The residual thermal stresses were determined using the Vickers indentation method and validated by finite element analysis. The residual stress profiles were similar among geometries in the same cooling protocol. XSC groups presented significantly higher tensile stresses (p = 0.000), especially for curved interfaces. XSC is a time-consuming process that showed no beneficial effect regarding residual stresses compared to the manufacturer recommended slow cooling rate.
dc.description.commentsAt the time of publication, author Mark Wolff was affiliated with New York University College of Dentistry. Currently, (s)he is a faculty member at the School of Dental Medicine at the University of Pennsylvania
dc.identifier.urihttps://repository.upenn.edu/handle/20.500.14332/8904
dc.legacy.articleid1247
dc.legacy.fields10.1016/j.ceramint.2016.03.018
dc.legacy.fulltexturlhttps://repository.upenn.edu/cgi/viewcontent.cgi?article=1247&context=dental_papers&unstamped=1
dc.rightsThis manuscript version is made available under the CC-BY-NC-ND 4.0 license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
dc.source.beginpage9214
dc.source.endpage9221
dc.source.issue192
dc.source.issue7
dc.source.journalDepartmental Papers (Dental)
dc.source.journaltitleJournal of the American Dental Association
dc.source.peerreviewedtrue
dc.source.statuspublished
dc.source.volume42
dc.subject.otherPorcelain-veneered zirconia
dc.subject.otherResidual thermal stresses
dc.subject.otherCooling rates
dc.subject.otherSpecimen geometries
dc.subject.otherVickers indentation method
dc.subject.otherFinite element analysis
dc.subject.otherDentistry
dc.titleExperimental and Finite Element Study of Residual Thermal Stresses in Veneered Y-TZP Structures
dc.typeArticle
digcom.contributor.authorTanaka, Carina B.
digcom.contributor.authorHarisha, Hossam
digcom.contributor.authorBaldassarri, Marta
digcom.contributor.authorWolff, Mark S.
digcom.contributor.authorTong, Hui
digcom.contributor.authorMeira, Josete B.C.
digcom.contributor.authorZhang, Yu
digcom.identifierdental_papers/192
digcom.identifier.contextkey21059610
digcom.identifier.submissionpathdental_papers/192
digcom.typearticle
dspace.entity.typePublication
upenn.schoolDepartmentCenterDepartmental Papers (Dental)
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
nihms767949.pdf
Size:
1 MB
Format:
Adobe Portable Document Format
Download
Collection
Articles