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Experimental and finite element study of residual thermal stresses in veneered Y-TZP structures
| Content Provider | Scilit |
|---|---|
| Author | Tanaka, Carina B. Harisha, Hossam Baldassarri, Marta Wolff, Mark S. Tong, Hui Meira, Josete B. C. Zhang, Yu |
| Copyright Year | 2016 |
| Description | Journal: Ceramics International The 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. |
| Related Links | https://manuscript.elsevier.com/S027288421630150X/pdf/S027288421630150X.pdf https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4831075/pdf |
| Ending Page | 9221 |
| Page Count | 8 |
| Starting Page | 9214 |
| ISSN | 02728842 |
| DOI | 10.1016/j.ceramint.2016.03.018 |
| Journal | Ceramics International |
| Issue Number | 7 |
| Volume Number | 42 |
| Language | English |
| Publisher | Elsevier BV |
| Publisher Date | 2016-03-03 |
| Access Restriction | Open |
| Subject Keyword | Journal: Ceramics International Porcelain-veneered Zirconia Residual Thermal Stresses Cooling Rates Specimen Geometries Vickers Indentation Method Finite Element Analysis |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ceramics and Composites Surfaces, Coatings and Films Materials Chemistry Electronic, Optical and Magnetic Materials Process Chemistry and Technology |
