Fracture of porcelain-veneered gold-alloy and zirconia molar crowns using a modified test set-up

DSpace Repository

Fracture of porcelain-veneered gold-alloy and zirconia molar crowns using a modified test set-up

Overview

Detailed record

dc.contributor.author Larsson, Christel
dc.contributor.author Drazic, Marko
dc.contributor.author Nilsson, Eddie
dc.contributor.author Vult von Steyern, Per
dc.date.accessioned 2017-03-23T10:10:30Z
dc.date.available 2017-03-23T10:10:30Z
dc.date.issued 2015 en_US
dc.identifier.issn 2333-7931 en_US
dc.identifier.uri http://hdl.handle.net/2043/22416
dc.description.abstract Objective: to compare fracture load and fracture mode of yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) and metal-ceramic (MC) molar crowns using a modified test set-up to produce fractures similar to those seen in vivo, i.e. fractures of the veneering material rather than complete fractures. Materials and methods: 13 high-noble-alloy MC and 13 Y-TZP molar crowns veneered with porcelain were manufactured. The crowns were artificially aged before final load to fracture. Load was applied using a 7mm diameter steel ball exerting force on the cusps with stresses directed toward the core-veneer interface. Fracture surface analysis was performed using light- and scanning electron microscopy. Results: The test design produced fractures of the veneering material rather than complete fractures. MC crowns withstood significantly (p>.001) higher loads (mean 2155 N) than Y-TZP (mean 1505 N) crowns yet both endure loads sufficient for predictable clinical use. Fracture mode differed between MC and Y-TZP. MC crowns exhibited fractures involving the core-veneer interface but without core exposure. One Y-TZP crown suffered a complete fracture, all others displayed fractures of the veneering material involving the core-veneer interface with core exposure. Conclusions: The test set-up produces fractures similar to those found in vivo and may be useful to evaluate the core-veneer interface of different material systems, both metals and ceramics. The study confirms suggestions from previous studies of a weaker core-veneer bond for Y-TZP compared to MC crowns. en_US
dc.format.extent 8
dc.language.iso eng en_US
dc.publisher Informa Healthcare en_US
dc.subject zirconia en_US
dc.subject metal-ceramic en_US
dc.subject crowns en_US
dc.subject fracture strength en_US
dc.subject fracture mode en_US
dc.subject failure analysis en_US
dc.subject in vitro en_US
dc.subject.classification Medicine en_US
dc.title Fracture of porcelain-veneered gold-alloy and zirconia molar crowns using a modified test set-up en_US
dc.type Article, peer reviewed scientific en_US
dc.contributor.department Malmö University. Faculty of Odontology
dc.identifier.doi 10.3109/23337931.2015.1057825 en_US
dc.subject.srsc Research Subject Categories::ODONTOLOGY en_US
dc.identifier.url http://www.tandfonline.com/doi/full/10.3109/23337931.2015.1057825 en_US
dc.relation.ispartofpublication Acta Biomaterialia Odontologica Scandinavica;1
dc.relation.ispartofpublicationvolume 1 en_US
dc.description.authorversion No en_US
dcterms.identifier.OAurl http://www.tandfonline.com/doi/full/10.3109/23337931.2015.1057825 en_US
dc.format.ePage 42
dc.format.sPage 35
mahlocal.rights.oaType green
 Find Full text Files for download
Icon

This item appears in the following Collection(s)

Overview

Search


Browse

My Account

Statistics