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Lava™ is Your System for Success

Lava crowns and bridges are strong, fit great and offer the natural translucency that has become the standard by which all other all ceramic crowns are judged. Achieving this perfect combination of performance and esthetics is the result of perfectly matched materials, machines, software and decades of knowledge and research. Lava crowns and bridges have been shown to achieve a five year 100% clinical survival rate.

Lava Zirconia

Not all zirconia is the same. Only genuine Lava zirconia by 3M ESPE has been subjected to the world class research and development, rigorous process controls and endless clinical testing that offer the long-term performance and piece-of-mind clinicians and lab owners can count on. From composition, grain size control of powders, homogenous additive distribution, processing and pre-sintering, all parameters are carefully evaluated and processed to give consistently high performance in every block of material produced. Available in sizes to accommodate up to 47mm spans, the Lava zirconia material is another part of the perfectly matched all ceramic system that is Lava.

5.2 Material Specifications
Lava™ Framework Ceramic
Density (ρ): 6.08 g/cm3
Flexural Strength (sB) (Punch Test) (#121473): > 1100 MPa
Fracture Toughness (KIC): 5-10 MPa m1/2
(Youngs) Modulus of elasticity (E): > 205 GPa
CTE: 10 ppm
Melting point: 2700 °C
Grain size: 0,5 µm
Vickers hardness (HV 10): 1250
Lava zirconia material specifications.

Source: Prof. Pospiech, Dr. Nothdurft and Dr Roundtree (University of Munich, University of Homburg)

Lava Shading Liquid

The patented coloring process for Lava crowns and bridges yields highly esthetic shaded understructures in seven different shading options. The Lava shading liquids have been specially developed to work with the Lava zirconia material and to be processed in the Lava Therm sintering oven. During R&D careful consideration was given to create a coloring agent and process that would not affect fit, marginal integrity, material strength and, consequently, long term performance.

Source: A. Behrens, B. Reusch and H. Hauptmann, 3M ESPE AG, Seefeld, Germany

The Lava ST Scanner

The Lava system begins with taking accurate electronic scans of your model work using the Lava ST Scanner. This revolutionary new scanner uses fringe projection and triangulation technology to capture high-density 3D data of the prepared and adjacent teeth. It has an improved scan window of 62 x 46mm and can scan a single unit, or three unit bridge in under two minutes. The data is then used by the Lava Design software to design coping and bridge frameworks that meet the lab technician’s specific esthetic and strength requirements for the case.

Source: F. Beuer, T. Fischer, K.-J. Erdelt, H.-U. Aggstaller, K. Spiegl, W. Gernet; 2005 IADR # 1336
In-vitro Study Marginal fit of Lava restorations; Dr. F. Beuer, K.-J. Erdelt, J. Schweiger, Industrial report

Lava Design Software

The Lava Design software comes standard with the Lava ST Scanner and permits the design of all indications including Lava crowns & bridges, inlay/only bridges, Maryland bridges and more.

Once scanned, the Lava Design software is the where all parameters for thickness, design and connectors are set and final understructure form is adjusted and reviewed. Additionally, the Lava Design software facilitates the point and click design for single unit copings as well as bridges, Maryland bridges, inlay/only bridges and implant abutments. Future uses of the Lava software will include manipulating data acquired from the Brontes digital impression, or COS (Chairside Oral Scanner), device.

The Lava Form Milling Machine

The Lava Form launched in 2003 as the world’s most advanced milling machine for dental restorations. Today, several years later it still leads the way with a design that facilitates highly precise computer controlled milling of Lava copings. A built in barcode reader helps to thwart the use of counterfeit materials and convey expected shrinkage data of the zirconia.

Additionally, the Lava Form calibrates each bur prior to, and following, each milling procedure. Burs deemed unfit for use are automatically replaced. The bur bank houses redundant burs in each size for uninterrupted milling.

The Lava Therm

The Lava Therm is the computer controlled sintering furnace that is responsible for the final sintering process of Lava zirconia units. This is where the final size and fit is ultimately determined and precision control is required. Overall the sintering process is 11 hours at 1,500 °C and must be timed to work in conjunction with the Lava shading liquid.

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