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Site Management
Wednesday
Sep112013

Durability Study - Advantages of Lithium Disilicate (IPS e.max®)

For anatomical single crowns, monolithic IPS e.max® lithium disilicate is more durable than other veneered all-ceramic systems, including zirconia.

  • A recent NYU Mouth Motion Fatigue and Durability Study shows that the veneering ceramic of a zirconia system is much more susceptible to fracture from chewing and other motions of the mouth compared to monolithic lithium disilicate.
  • The result of the above test is similar to previous findings for other veneered zirconia systems, including Lava™/Lava™ Ceram and Cercon®/Vita® Veneer.
  • Lithium disilicate is a high strength ceramic material with a flexural strength at 360 to 400 MPa, while porcelain materials used in veneered zirconium crowns have a flexural strength of 80 to 110 MPa.
  • As with veneered zirconium oxide systems, conventional cementation can be used for lithium disilicate due to its high strength.
  • Previous monolithic glass-ceramic structures required adhesive bonding because they did not have the structural strength of lithium disilicate.
IPS e.max lithium disilicate provides outstanding esthetics while ensuring greater strength.
  • Lithium disilicate achieves a very high translucency, and the material is available in four translucencies.
  • Traditional oxide ceramics that contain an oxide ceramic core material such as zirconia present some esthetic challenges since the zirconia has an increased opacity. This is not appropriate for i.e. inlays onlays, partial crowns or thin veneers
Due to its strength and multiple translucencies, IPS e.max lithium disilicate can be used for a wide range of indications, including:
  • Anterior/posterior crowns.
  • Inlays/onlays.
  • Veneers.
  • Thin veneers.
  • Crowns on implants.
  • Anterior three-unit bridgework up to the second premolar applying press technology.
Competitive references have been made implying IPS e.max is Empress® 2. IPS e.max lithium disilicate is not Empress 2. IPS e.max is a lithium disilicate glass ceramic, which is optimized in translucency, durability and strength for full anatomical restorations.

 
For anatomical single crowns, monolithic IPS e.max® lithium disilicate is more durable than other veneered all-ceramic systems, including zirconia.

  • A recent NYU Mouth Motion Fatigue and Durability Study shows that the veneering ceramic of a zirconia system is much more susceptible to fracture from chewing and other motions of the mouth compared to monolithic lithium disilicate.
  • The result of the above test is similar to previous findings for other veneered zirconia systems, including Lava™/Lava™ Ceram and Cercon®/Vita® Veneer.
  • Lithium disilicate is a high strength ceramic material with a flexural strength at 360 to 400 MPa, while porcelain materials used in veneered zirconium crowns have a flexural strength of 80 to 110 MPa.

 As with veneered zirconium oxide systems, conventional cementation can be used for lithium disilicate due to its high strength.

Previous monolithic glass-ceramic structures required adhesive bonding because they did not have the structural strength of lithium disilicate.

IPS e.max lithium disilicate provides outstanding esthetics while ensuring greater strength.

  • Lithium disilicate achieves a very high translucency, and the material is available in four translucencies.
  • Traditional oxide ceramics that contain an oxide ceramic core material such as zirconia present some esthetic challenges since the zirconia has an increased opacity. This is not appropriate for i.e. inlays onlays, partial crowns or thin veneers.

 Due to its strength and multiple translucencies, IPS e.max lithium disilicate can be used for a wide range of indications, including: 

  • Anterior/posterior crowns.
  • Inlays/onlays.
  • Veneers.
  • Thin veneers.
  • Crowns on implants.
  • Anterior three-unit bridgework up to the second premolar applying press technology.

Competitive references have been made implying IPS e.max is Empress® 2. IPS e.max lithium disilicate is not Empress 2. IPS e.max is a lithium disilicate glass ceramic, which is optimized in translucency, durability and strength for full anatomical restorations.

Source: Ivoclar Vivadent

 

Wednesday
Sep112013

Willi Geller - Live demo on stage working with a three unit zirconium bridge using Creation (ZI-F)