Podcast
Questions and Answers
What is a primary characteristic of the IPS Empress CAD material?
What is a primary characteristic of the IPS Empress CAD material?
- It is exclusively used for posterior crowns.
- Leucite crystals are not evenly distributed.
- It contains no glass matrix.
- It does not require a second heating cycle for the crystalline phase. (correct)
Which of the following statements is true regarding the IPS Empress II material?
Which of the following statements is true regarding the IPS Empress II material?
- Lithium-disilicate glass provides less translucency.
- It contains a low percentage of crystalline structures.
- It has a high refractive index.
- It hinders crack propagation effectively. (correct)
Which types of restorations are indicated for the lithium disilicate IPS e.max Press material?
Which types of restorations are indicated for the lithium disilicate IPS e.max Press material?
- Cantilever bridges.
- Inlay-retained fixed partial dentures (FPD).
- Only posterior crowns.
- 3-unit anterior fixed partial dentures. (correct)
What is a contraindication for using IPS e.max?
What is a contraindication for using IPS e.max?
What is a benefit of using VITA SUPRINITY glass ceramic material?
What is a benefit of using VITA SUPRINITY glass ceramic material?
What is the primary purpose of the absorbent refractory die in the In-Ceram technique?
What is the primary purpose of the absorbent refractory die in the In-Ceram technique?
What reduces the strength of the In-Ceram material when magnesium oxide crystals are added?
What reduces the strength of the In-Ceram material when magnesium oxide crystals are added?
Which statement about In-Ceram zirconia is correct?
Which statement about In-Ceram zirconia is correct?
What process is used to infuse the residual pores of the core in the In-Ceram technique?
What process is used to infuse the residual pores of the core in the In-Ceram technique?
What is the typical strength range for In-Ceram materials designed for anterior and posterior crowns?
What is the typical strength range for In-Ceram materials designed for anterior and posterior crowns?
What is the primary composition of glass-based ceramics?
What is the primary composition of glass-based ceramics?
Which option is a type of reinforced glass ceramic?
Which option is a type of reinforced glass ceramic?
What percentage of alumina is typically added to feldspathic ceramics as a reinforcing component?
What percentage of alumina is typically added to feldspathic ceramics as a reinforcing component?
Which material is specifically mentioned as being machinable for the fabrication of veneers, inlays, and onlays?
Which material is specifically mentioned as being machinable for the fabrication of veneers, inlays, and onlays?
What is the primary component used to enhance the strength of glass ceramics in zirconia-reinforced lithium silicate ceramics?
What is the primary component used to enhance the strength of glass ceramics in zirconia-reinforced lithium silicate ceramics?
What is the typical range of flexural strength for feldspathic ceramics?
What is the typical range of flexural strength for feldspathic ceramics?
Which type of material is utilized for the specific veneering of alumina-based core systems?
Which type of material is utilized for the specific veneering of alumina-based core systems?
Which ceramic is indicated for fabricating full veneer crowns and three-unit FPDs up to the second premolars?
Which ceramic is indicated for fabricating full veneer crowns and three-unit FPDs up to the second premolars?
Which of the following ceramics is described as containing over 50% silica?
Which of the following ceramics is described as containing over 50% silica?
What is the strength of the Celtra Duo when polished?
What is the strength of the Celtra Duo when polished?
What category does glass infiltrated alumina fall under in microstructural classification?
What category does glass infiltrated alumina fall under in microstructural classification?
What component is primarily responsible for the translucency of feldspathic restorations?
What component is primarily responsible for the translucency of feldspathic restorations?
Which of the following compounds is NOT a form of ceramic system classification mentioned?
Which of the following compounds is NOT a form of ceramic system classification mentioned?
What is the primary advantage of Vita Ambria over IPS e.max press ceramics?
What is the primary advantage of Vita Ambria over IPS e.max press ceramics?
How much zirconia is contained in Vita Suprinity, according to its composition?
How much zirconia is contained in Vita Suprinity, according to its composition?
Which ceramic system is known for having the highest strength at more than 500 MPa?
Which ceramic system is known for having the highest strength at more than 500 MPa?
What is a key advantage of using premanufactured blocks in dental ceramics?
What is a key advantage of using premanufactured blocks in dental ceramics?
Which of the following is NOT a feature of VITABLOCS®?
Which of the following is NOT a feature of VITABLOCS®?
Which material was promoted by VITA in 1991 with improved composition and properties?
Which material was promoted by VITA in 1991 with improved composition and properties?
What is the flexural strength of IPS Empress?
What is the flexural strength of IPS Empress?
Which category does the IPS Empress fall under in microstructural classification?
Which category does the IPS Empress fall under in microstructural classification?
What is the main crystalline phase in IPS Empress?
What is the main crystalline phase in IPS Empress?
Which of the following is true regarding Category II (Synthetic) in microstructural classification?
Which of the following is true regarding Category II (Synthetic) in microstructural classification?
Which of the following statements about VITABLOCS® TriLuxe is accurate?
Which of the following statements about VITABLOCS® TriLuxe is accurate?
Flashcards
Glass-ceramic composition
Glass-ceramic composition
Glass-ceramics are composed primarily of glass, with added materials like zirconia, for enhanced properties.
Zirconia reinforced lithium silicate (ZLS)
Zirconia reinforced lithium silicate (ZLS)
A type of high-strength glass-ceramic containing 10% zirconia to improve its fracture resistance.
Celtra Duo
Celtra Duo
A high strength glass ceramic containing 10% zirconia-reinforced lithium silicate used for crowns, implants, inlays onlays and veneers.
VITA AMBRIA
VITA AMBRIA
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All-ceramic systems
All-ceramic systems
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Classification of ceramic systems
Classification of ceramic systems
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Infiltrated ceramic (Slip-cast ceramic)
Infiltrated ceramic (Slip-cast ceramic)
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Glass-infiltrated alumina
Glass-infiltrated alumina
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All-Ceramic Systems
All-Ceramic Systems
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Premanufactured block benefit
Premanufactured block benefit
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Glass-based (Feldspathic) Ceramics
Glass-based (Feldspathic) Ceramics
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VITABLOCS®
VITABLOCS®
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Reinforced Glass Ceramics
Reinforced Glass Ceramics
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VITA Mark II
VITA Mark II
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VITABLOCS® TriLuxe/TriLuxe forte
VITABLOCS® TriLuxe/TriLuxe forte
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Zirconia Ceramics
Zirconia Ceramics
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VITABLOCS® RealLife
VITABLOCS® RealLife
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Resin-based Ceramics
Resin-based Ceramics
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Glass Infiltrated Alumina
Glass Infiltrated Alumina
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All-Ceramic Systems Classification
All-Ceramic Systems Classification
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Feldspars
Feldspars
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Glass-based (Feldspathic) Ceramics
Glass-based (Feldspathic) Ceramics
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Category II (Synthetic) Glass-based systems
Category II (Synthetic) Glass-based systems
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Flexural Strength
Flexural Strength
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Microstructural Classification
Microstructural Classification
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IPS Empress
IPS Empress
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Leucite Crystals
Leucite Crystals
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Category I
Category I
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IPS Empress CAD
IPS Empress CAD
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IPS Empress II (now IPS e.max)
IPS Empress II (now IPS e.max)
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IPS e.max press
IPS e.max press
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IPS e.max CAD
IPS e.max CAD
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Lithium-disilicate
Lithium-disilicate
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Category II (Synthetic)
Category II (Synthetic)
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Indications (IPS e.max)
Indications (IPS e.max)
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Contraindications (IPS e.max)
Contraindications (IPS e.max)
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VITA SUPRINITY
VITA SUPRINITY
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Inlay
Inlay
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Onlay
Onlay
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Crown
Crown
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Veneer
Veneer
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In-Ceram fabrication
In-Ceram fabrication
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Absorbent refractory die
Absorbent refractory die
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VITA In-Ceram
VITA In-Ceram
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Sintering
Sintering
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Interpenetrating phase materials
Interpenetrating phase materials
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In-Ceram strength
In-Ceram strength
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Alumina
Alumina
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Glass infiltration
Glass infiltration
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Study Notes
All-Ceramic Systems
- I. Glass-based (Feldspathic): Made primarily of silica. Acid-etched ceramic contains more than 50% silica. Feldspathic (Silica Based).
- II. Reinforced Glass ceramics: Include IPS Empress, IPS e.Max ceramics, Vita Suprinity (10% Zirconia), Celtra Duo (10% Zirconia)
- III. Glass-infiltrated alumina: Composed of In-ceram and Spinel
- IV. Zirconia ceramic: High-performance ceramic
- V. Resin-based ceramics: Ceramic reinforced resins (e.g., Vita Enamic, Lava Ultimate, Visio ligne, CeraSmart, Brilliant, Grandio)
Microstructural
-
Category I: Glass-based systems (mainly silica)
-
Acid etched ceramic contains more than 50% silica
-
Feldspathic (Silica Based)
-
Glass-based systems contain mainly silicon dioxide (silica or quartz), which contains various levels of alumina (alumino-silicates)
-
Potassium and sodium are known as feldspars
Category II (Synthetic)
- 1. Low-to-moderate leucite-containing feldspathic glass: Feldspathic porcelains; Leucite added to raise thermal expansion coefficient; Can be applied to metals and zirconia. Example: Vita VM13
- 2. High-leucite containing glass: IPS Empress glass contains leucite crystal as a major crystalline phase (35%-50%) in a glassy matrix. Flexural strength: ~160 MPa.
Category III (Non Silica Based)
- Crystalline-Based systems with glass filler (mainly alumina) Introduced in 1988. Example: In-Ceram Infiltrated ceramics (slip-cast)
Infiltrated Ceramic (slip-Cast ceramic)
- Glass infiltrated Alumina.
- Products in two components:
- Powder (aluminum oxide—porous substructure)
- Glass infiltrated at high temperature into the porous substructure
- Interpenetrating phase materials are generally fabricated by first creating a porous matrix, in the case of VITA In-Ceram(ceramic sponge). The pores are filled by the second-phase material, a lanthanum aluminosilicate glass. Capillary action is used to produce a dense interpenetrating material.
- Core Formation (A): Slurries of the fine alumina powder and water (“slip”) are applied to an absorbent refractory die, this is then sintered for 10 hours at 1120°C to produce a porous core.
- Importance of absorbent refractory die:
- Absorbs water from the slip, leading to condensation
- Refractory die shrinks more than the condensed slip, enabling easy separation.
Residual Porosities
- Residual pores are infused with molten glass by capillary action. In-Ceram is fired at ~1100°C for 4–6 hours.
- Veneering porcelain (Vitadur alpha Aluminious) is then applied using conventional powder slurry technique.
Indications
- Veneers, inlays, onlays, anterior and posterior crowns, 3-unit anterior FPD, 3-unit FPD up to the second premolar as the abutment tooth
Contraindications
- Posterior FPD reaching into the molar region, 4-unit FPD, inlay-retained FPD, patients with short dentition, bruxism, cantilever bridges
VITA SUPRINITY
- A new generation of glass ceramic material product.
- The glass ceramic is enriched with zirconia (approx. 10% by weight) to offer a high-strength, zirconia-reinforced lithium silicate ceramic (ZLS).
- 420 MPa
CELTRA Duo
- High-strength glass ceramics with 10% zirconia-reinforced lithium silicate-ZLS.
- 210 MPa (polishing), 370 MPa (firing), 420 MPa (bonding).
- Indicated for single-unit anterior and posterior crowns, single-tooth implant superstructures.
VITA AMBRIA
- Vita Ambria (ZLS) is similar to Vita Suprinity with 10% zirconia fillers in its lithium disilicate glass-ceramic matrix.
- Showed more fracture resistance than IPS e.max press.
- Very high stability (>500 MPa). Used for inlays, onlays, full veneer crowns, three-unit FPD up to the second premolars.
IPS e.max press
- Crystalline phase is lithium disilicate (makes up ~70% of the volume of the glass ceramic).
- 400-450 MPa (after bonding)
- 500-530 MPa (e-max CAD).
Modifications for In-Ceram Technique
- 1. In-Ceram Contains Magnesium Oxide:
- Contains magnesium oxide crystal to form alumina–magnesium oxide (spinel) as a major crystalline phase.
- Improves translucency but decreases strength by 25% to 40%.
- 2. In-Ceram Zirconia:
- Contains zirconium oxide crystal.
- Its strength is 1.4 times that of In-Ceram alumina.
- Associated with increased opacity.
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