Modified Y-TZP Core Design Improves All-ceramic Crown Reliability
Open Access
- 5 November 2010
- journal article
- research article
- Published by SAGE Publications in Journal of Dental Research
- Vol. 90 (1), 104-108
- https://doi.org/10.1177/0022034510384617
Abstract
This study tested the hypothesis that all-ceramic core-veneer system crown reliability is improved by modification of the core design. We modeled a tooth preparation by reducing the height of proximal walls by 1.5 mm and the occlusal surface by 2.0 mm. The CAD-based tooth preparation was replicated and positioned in a dental articulator for core and veneer fabrication. Standard (0.5 mm uniform thickness) and modified (2.5 mm height lingual and proximal cervical areas) core designs were produced, followed by the application of veneer porcelain for a total thickness of 1.5 mm. The crowns were cemented to 30-day-aged composite dies and were either single-load-to-failure or step-stress-accelerated fatigue-tested. Use of level probability plots showed significantly higher reliability for the modified core design group. The fatigue fracture modes were veneer chipping not exposing the core for the standard group, and exposing the veneer core interface for the modified group.Keywords
This publication has 39 references indexed in Scilit:
- Performance of Zirconia for Dental HealthcareMaterials, 2010
- Laboratory Simulation of Y-TZP All-ceramic Crown Clinical FailuresJournal of Dental Research, 2009
- Effect of framework design on crown failureEuropean Journal of Oral Sciences, 2009
- PORCELAIN-FUSED-TO-METAL (PFM) ALTERNATIVESJournal of Esthetic and Restorative Dentistry, 2009
- Three-year clinical prospective evaluation of zirconia-based posterior fixed dental prostheses (FDPs)Clinical Oral Investigations, 2009
- Fractographic failure analysis of a Procera® AllCeram crown using stereo and scanning electron microscopyDental Materials, 2008
- An overview of zirconia ceramics: Basic properties and clinical applicationsJournal of Dentistry, 2007
- Role of indenter material and size in veneer failure of brittle layer structuresJournal of Biomedical Materials Research Part B: Applied Biomaterials, 2007
- Modeling of water absorption induced cracks in resin-based composite supported ceramic layer structuresJournal of Biomedical Materials Research Part B: Applied Biomaterials, 2007
- Models and Data Analyses for Step and Varying StressPublished by Wiley ,1990