Open AccessJournal Article
The fracture resistance of all-ceramic crowns on supporting structures with different elastic moduli.
S S Scherrer,W G de Rijk +1 more
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This in vitro study evaluated the fracture resistance of all-ceramic crowns as a function of the elastic moduli of the supporting die and found the fracture load increased markedly with the increase in elastic modulus.Abstract:
This in vitro study evaluated the fracture resistance of all-ceramic crowns as a function of the elastic modulus of the supporting die. All-ceramic crowns were made for dies with three different elastic moduli and two different crown lengths. The occlusal surface was loaded in compression with a 12.7-mm steel ball. The fracture load increased markedly with the increase in elastic modulus. The largest increase was seen when only the occlusal surface of the crown was covered. The characteristic fracture load of the complete-crown restorations was more than double that of the occlusal-cover restorations in the dies with the lowest modulus of elasticity, while for the dies with the highest modulus of elasticity the difference in the characteristic fracture load for the two configurations was not significant.read more
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Current ceramic materials and systems with clinical recommendations: A systematic review
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Clinically relevant approach to failure testing of all-ceramic restorations.
TL;DR: Validated tests are needed to elucidate the role(s) that cement systems, bonding, occlusion, and even metal copings play in the success of fixed prostheses and to make meaningful comparisons possible among novel ceramic and metal substructures.
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Tooth structure removal associated with various preparation designs for anterior teeth
Daniel Edelhoff,John A. Sorensen +1 more
TL;DR: Tooth preparations for porcelain laminate veneers and resin-bonded prostheses retainers required approximately one-quarter to one-half the amount of tooth reduction of conventional complete-coverage crowns.
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High-strength CAD/CAM-fabricated veneering material sintered to zirconia copings — A new fabrication mode for all-ceramic restorations
Florian Beuer,Josef Schweiger,Marlis Eichberger,Heinrich Kappert,Wolfgang Gernet,Daniel Edelhoff +5 more
TL;DR: The new CAD/CAM-fabricated bilayered bilayering restorations (ST) were superior to the present techniques (VT and OT) in terms of fracture load and offer the possibility to produce cost-effective crowns and fixed partial dentures with a potential lower risk of chippings.
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Use of contact testing in the characterization and design of all-ceramic crownlike layer structures: A review
TL;DR: It is demonstrated that radial cracking from the lower core layer surface is the dominant failure mode for ceramic layer thicknesses much below 1 mm, and an approach may be used to establish a scientific, materials-based foundation for designing next-generation crown layer structures.