Ceramic Materials- Lithium Disilicate vs Zirconia
zirconia
(is unaesthetic but may need it may be needed to cover stains, fluorescent properties)
1. Lithium Disil HT 2.LAVA Zircona • NDM- natural die material
1.highest translucency 2. lowest
1.5 mm You could add layering ceramic on zirconia coping
Contacts ___ away from Metal-Porcelain Junction
shade of the die (NDM) darkest shade AFTER
For every all ceramic restoration you need to select the____, chosen based on the ____ in the tooth (___ PREPARATION), so the lab can play around with it eventually giving you same crown shade but different prep tooth color
1. a supported frame work design 2. framework zirconia
Influence of zirconia framework design on fracture load of layering zirconia 1. must have what? 2.Layering zirconia isn't getting an occlusal forces, but the ____is
Feldspathic -> leucite based > lithium discilicate> Aluimina>Zirconia
greatest light transition to least
flexural strength
high crystal has higher flexural strength, ability to withstand forces, for an FDP you want more
monolthic-> bilayer
to get an esthetic outcome with zirconia
opaque LDS opaque cement
translucency vs. opacity (to cover discolored tooth you can use a more ____ material, layer, or use the different types of ___, or use a more ___)
the same as or slightly lower than that of zirconia.
The coefficient of thermal expansion of the veneering ceramic is set to be___
-those that influence the movement of the posterior portion of the mandible :TMJs -those that influence the movement of the posterior portion of the mandible :TMJs those that influence the movement of the anterior portion of the mandible:the anterior teeth
The structures that control mandibular movement are divided into two types:
Leucite based
What has a flexural strength of 140
Lithium disilicate
What has a flexural strength of 360?
Alumina
What has a flexural strength of 600?
Feldspathic (80-90)
Which has the least flexural strength ?
zirconia (900-1200)
Which has the most flexural strength ?
