Stepwise stress testing of different CAD-CAM lithium disilicate veneer application methods applied to lithium disilicate substructures
| Autor: | Alexandre Luiz Souto Borges, Anelyse Arata, S.A. Feitosa, Jaren T. May, Kim E. Diefenderfer, Nelson Batista de Lima, NB Cook |
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| Přispěvatelé: | Indiana University School of Dentistry (IUSD), Nuclear and Energy Research Institute, Universidade Estadual Paulista (UNESP) |
| Rok vydání: | 2022 |
| Předmět: |
Dental Stress Analysis
Ceramics Materials science Surface Properties medicine.medical_treatment Porcelain Veneer Dental Porcelain Dental Materials Fatigue resistance Flexural strength Materials Testing Lithium disilicate medicine Computer-Aided Design Principal stress Veneer Zirconium Oral Surgery Composite material Application methods |
| Zdroj: | Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| ISSN: | 0022-3913 |
| DOI: | 10.1016/j.prosdent.2020.05.033 |
| Popis: | Made available in DSpace on 2022-04-29T08:45:35Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-01-01 Indiana University Delta Statement of problem: Whether a computer-aided design and computer-aided manufacture (CAD-CAM) fabricated high-translucency lithium disilicate veneer on a lithium disilicate substructure would increase the strength of the restoration compared with a traditional feldspathic porcelain veneer is unclear. Purpose: The purpose of this in vitro study was to evaluate the effect of different lithium disilicate veneer application methods on a lithium disilicate substructure on their biaxial flexural stress (BFS). Material and methods: Lithium disilicate disks were fabricated so that when combined with the veneering disks, they had a dimension of 12×1.2 mm. Experimental groups were as follows (n=15): resin-bonded lithium disilicate veneer, lithium disilicate veneer adhesively cemented to lithium disilicate; sintered lithium disilicate veneer, lithium disilicate veneer sintered to lithium disilicate; sintered feldspathic veneer, feldspathic porcelain applied to lithium disilicate; and monolithic lithium disilicate, the control group. Weibull distribution survival analysis was used to compare the differences in the resistance to fracture after fatigue. The total number of cycles was analyzed by using 1-way ANOVA (α=.05). A finite element analysis (FEA) was also performed. The maximum principal stress (MPS) was used as the failure criterion. Results: The sintered feldspathic veneer group had significantly lower fatigue resistance than sintered lithium disilicate veneer or resin-bonded lithium disilicate veneer (P |
| Databáze: | OpenAIRE |
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