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Lava™ Crowns and Bridges
What is Lava?
Lava™ Crowns and Bridges from 3M ESPE utilize an innovative CAD/CAM technology for producing all-ceramic crowns and bridges on a zirconium-oxide glass-free polycrystalline base, resulting in high-strength, reliable restorations with excellent esthetics and outstanding marginal fit. Preparations require minimal removal of tooth structure, and cementation can be accomplished using proven, conventional techniques.
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Lava is much more than zirconia! It is a "Digital Platform"
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- Digital Impression
- Digital Scan
- Digital Design
- CADCAM mill
- Digital sintering
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Clinical Studies results:
- Zero fracture of the zirconia coping and no debonding of the porcelain to the zirconia.
- No fracture of the framework ==> 100% survival rate
- No allergic reaction or negative influence
- No secondary caries
- No changes in fit
- Slight chippings in single cases still in situ (no need for re-treatment)
- No marginal discoloration
- No post-op sensitivity
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Why zirconia?
- Zirconia strengths are comparable to metal.
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Zirconia is crack resistant, and undergoes a phenomenon called
"transformation toughening"
- Zirconia's strength allows traditional PFM preparation desig
- Lava's higher strength allows traditional cementation, as well as bonding
Coping thicknesses can be as little as 3/10ths in the anterior resulting in:
A) A need for less tooth reduction, or
B) Increased room for esthetic porcelain
- Lava's Zirconia translucency is similar to natural dentin.
- Zirconia is insoluble, which is important in regards to long-term strength
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Due to the strength of Zirconia', Lava's bridge connector sizes are esthetic and are comparable to the size of metal connectors
- Fits are similar or better than metal
- Being metal free, esthetics are naturally much better than PFM's
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Processing Scheme
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Previous All -Ceramic Crowns Disadvantages:
Traditional problem with ceramics: Crack Propagation
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