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Jak úspěšně napravit neúspěch - Test 16 : fraktura korunky na implantátu
[How to retrieve failure succesfuly - Test 16 : fracture of lithium disilicate acrown on dental implant]

Aleš Váňa

. 2017 ; 27 (4) : 85-87.

Language Czech Country Czech Republic

Document type Case Reports

Persistent link   https://www.medvik.cz/link/bmc17021980

x

Crowns and Fixedpartials dentures experience a rapid shift toward ceramic materials, partially for their aesthetics. However, ceramics are susceptible to fracture, comparable to metal frameworks. Porcelains with the most desirable aesthetics tend also to have the lowest toughness. Conversely, tougher ceramics such as zirkonias are not generally aesthetic. Glass-ceramics are in the middle of the scale. Failures in dental ceramics may arise during fabrication in a laboratory. They can take the form of microstructural defects, often below visual contact. In the presented study there was a need to unglue abutment crown to correct colour. Coefficient of thermal expansion between glass-ceramic core and titanium base led to tensile stress and subsequent fracture of the crown. The new zirkonia-based ceramic crown was a material of choice, especially for its high flexural strength.

How to retrieve failure succesfuly - Test 16 : fracture of lithium disilicate acrown on dental implant

Malé ilustrované repetitorium

fraktura korunky na implantátu

fracture of lithium disilicate acrown on dental implant

Bibliography, etc.

Literatura

Formatted Contents

Test 16 --Test 16 - řešení

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$a Crowns and Fixedpartials dentures experience a rapid shift toward ceramic materials, partially for their aesthetics. However, ceramics are susceptible to fracture, comparable to metal frameworks. Porcelains with the most desirable aesthetics tend also to have the lowest toughness. Conversely, tougher ceramics such as zirkonias are not generally aesthetic. Glass-ceramics are in the middle of the scale. Failures in dental ceramics may arise during fabrication in a laboratory. They can take the form of microstructural defects, often below visual contact. In the presented study there was a need to unglue abutment crown to correct colour. Coefficient of thermal expansion between glass-ceramic core and titanium base led to tensile stress and subsequent fracture of the crown. The new zirkonia-based ceramic crown was a material of choice, especially for its high flexural strength.
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$a titan $7 D014025
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