A comparison of fracture strength of yttrium-oxide-partially-stabilized zirconia ceramic crowns with varying core thickness, shapes and veneer ceramics
2004 (English)In: Journal of Oral Rehabilitation, ISSN 0305-182X, E-ISSN 1365-2842, Vol. 31, no 7, 682-688 p.Article in journal (Refereed) Published
The fracture strengths of stylized all-ceramic crowns manufactured using an yttrium-oxide-partially-stabilized (Y-TZP) zirconia ceramic core (Denzir) veneered with lithium disilicate glass-ceramics (IPS Empress 2 or IPS Eris) were evaluated. The Denzir cores were manufactured in two ways: either with different thicknesses in different parts of the restoration, called an ‘adapted Denzir core’; or with a uniform core thickness of 0.5 mm. IPS Empress 2 all-ceramic crowns served as reference. There was no significant difference between the crowns with an ‘adapted Denzir core’ veneered with the two brands of glass-ceramics. No significant difference was seen between the crowns with a 0.5 mm Denzir core veneered with the two brands of glass-ceramics. The crowns with an ’adapted Denzir core’ exhibited significantly higher values than those with a 0.5 mm Denzir core and than the IPS Empress 2 crowns used as reference. No significant differences were seen among the IPS Empress 2 crowns used as reference and the crowns with a 0.5 mm Denzir core. The mode of failure varied among the Empress 2 crowns and the crowns with a core of a Y-TZP zirconia ceramic. Long-term studies are necessary to assess the clinical performance of this restorative system.
Place, publisher, year, edition, pages
2004. Vol. 31, no 7, 682-688 p.
All-ceramic crowns, CAD/CAM, Dental ceramics, Glass-ceramics, Fracture strength, Y-TZP, Zirconia
IdentifiersURN: urn:nbn:se:umu:diva-6431DOI: 10.1111/j.1365-2842.2004.01284.xPubMedID: 15210030OAI: oai:DiVA.org:umu-6431DiVA: diva2:146100