E3: You down with ACC? Yeah you know me! Flashcards
(27 cards)
What are 5 contraindications to the ACC?
1.Limited interocclusal distance 2.Heavy Occlusial Forces 3.Bad Habits 4.dry at cementation 5.subgingival preps
Whats the primary advantage of the ACC?
Esthetics!
Disadvantage of ACC: Low ______ potential
repair
Disadvantage of ACC: Difficult intraoral ________
polishing
Disadvantage of ACC: _____ of apposing dentition and restorations:
Wear
What are the 3 compositions of dental ceramics?
1.Predominantly Glass 2. Particle-filled glass 3.Polycrystalline
It is important to understand the fact that highly esthetic ceramics are WHAT COMPOSITION?, and ceramics that exhibit high strength are generally WHAT COMPOSITION?.
predominately glass……crystalline
Lithium disilicate is an example of WHAT COMPOSITON?
particle-filled glass (in between esthetics and strength!)
Zerconia ceramic is an example of WHAT COMPOSITION?
polycrystalline (strength, less esthetic)
Power Liquid Ceramics: Natural _________ and vitality…Can be as thin as ____ mm…Must be ______ to the tooth….Marginal fit is ________
translucency…0.2 mm…bonded…excellent!
What’s the first example of slip casting?
Spinell
Which ACC method? High strength, Good esthetics, Custom-colored core, Single crowns: high success rate and longest clinical trials, Anterior FPD applications
in-ceram
Hot pressing ceramic uses the _______ technique. please don’t get this wrong.
LOST WAX
DR. HARRIS SLIDE: IPS Empress is a leucite-reinforced glass ceramic (SiO2-Al2O3). IPS Empress has a low flexural strength of ____±10 UNITS? limiting its use to single unit complete-coverage restorations in the anterior region
112 Mega Pascals…NERD!
DR. HARRIS SLIDE: IPS Empress 2 is a LITHIUM-DISILICATE glass ceramic (SiO2-Li2O). IPS Empress 2 has a flexural strength of _________ which is much HIGHER than that of IPS Empress
400±40 MPa (leucite was only 112 MPa)
Empress has its strength increased because it is ______ to the tooth!
BONDED
What are the two disadvantages to the empress system?
relatively weak and expensive equipment/supplies
CAD/CAM starts out as prefabricated __________.
glass- ceramic ingots
The production of Procera will start with milling an ______ die to compensate for the _______ shrinkage
enlarged …. sintering
How much shrinkage is there upon sintering in Procera?
20% Shrinkage
Procera Milling process provides ____ micron cement space.
50 micron
ACC design: MUST have _______ line angles!
ROUDNED
ACC design specifications: Incisal: _____, Facial Axial Reduction _____, Lingual axial reduction _____, Marginal _____.
Incisal: 2.0mm , Facial Axial Reduction 1.5mm, Lingual axial reduction 1.5mm , Marginal 1.0mm.
Which material has a high success rate with LONGEST CLINICAL TRIALS?
In-Ceram
