Competing Damage Modes in All-Ceramic Crowns: Fatigue and Lifetime

Yu Zhang; Brian R. Lawn

doi:10.4028/www.scientific.net/KEM.284-286.697

Paper Titles

In Vitro Mesenchymal Stem Cell Culture Using Calcium Phosphate Glass Scaffold
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Preparation of Hydroxyapatite Ceramic Unit with a Trap for 2-D Cultured Cells
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Effect of Calcium Phosphate Addition to Alginate Microspheres: Modulation of Enzyme Release Kinetics and Improvement of Cell Adhesion
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Tensile and Compressive Behaviours and Properties of a Bone Analogue Biomaterial
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Competing Damage Modes in All-Ceramic Crowns: Fatigue and Lifetime
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Carboxymethylchitosan/Calcium Phosphate Hybrid Materials Prepared by an Innovative Auto-Catalytic Co-Precipitation Method
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Multi-Scale Structure of the Pinctada Mother of Pearl: Demonstration of a Continuous and Oriented Organic Framework in a Natural Ceramic
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The Influence of Sintering Temperature on the Properties of Composites of Biologic Hydroxyapatite and Zirconia
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Blood Compatibility of Organic-Inorganic Biomedical Materials
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 284-286Competing Damage Modes in All-Ceramic Crowns:...

Competing Damage Modes in All-Ceramic Crowns: Fatigue and Lifetime

Abstract:

A study is made of fracture from cyclic loading of WC spheres on the surfaces of brittle layers on compliant substrates, as representative of repetitive occlusal contact on dental crowns. Several damage modes—radial cracks at both top surface and cementation interface, and classical cone cracks as well as deep penetrating cone cracks from the top surface—have been identified and analyzed. The most dangerous fractures are radial cracks that initiate from either the top or bottom surfaces of the brittle layers and spread laterally to failure. In fatigue, these cracks are driven by chemical forces associated with the intrusion of water into the crack. Also dangerous are deep penetrating cone cracks which, unlike their classical cone crack counterparts, are mechanically driven by hydraulic pumping and can evolve rapidly with cyclic loading, threatening the lifetime of a dental crown veneer.