Lava™ no comments
3M ESPE’s all-ceramic CAD/CAM system offers the high strength of zirconia with outstanding computer designed and milled marginal fit. The patented substructure shading system is available in 8 shades. Indicated for posterior and anterior crowns and bridges, Lava offers natural translucency and unmatched aesthetics.
Preparation for Lava™ Crowns and Bridges
Many Procedures Remain the Same With 3M™ ESPE™ Lava™ Crowns and Bridges, you provide high-quality restorations to your customers. In addition to natural aesthetics and durability, Lava crowns and bridges also stand out for their excellent fit. To achieve this, practice and laboratory have to meet just a few basic requirements.
Zirconium Oxide—the Framework Material of the Future Allows Minimal Reduction
Unlike traditional all-ceramic restorations, Lava restorations have a substructure made of zirconium oxide. This strong material does not require an aggressive shoulder to support the framework or to enhance the esthetics. In addition, the margins can be thinly tapered. The zirconia used for Lava™ Framework is strong enough to allow for thin walls. Space for an opaque layer is not required. Therefore, a reduction of the tooth structure based on the dimensions indicated below is sufficient. This means the preparation for Lava restorations protects the tooth structure. A preparation matrix of the initial clinical situation can be helpful in order to check the progress of your tooth reduction during the preparation.
Ideal Preparation: Shoulder or Chamfer to Allow Precise Margin Detection
Ideally, the preparation includes a circumferential shoulder or chamfer with a horizontal angle of at least 5°. The vertical preparation angle should be at least 4°. The inside angle of the shoulder preparation must be given a rounded contour. All occlusal and incisal edges should also be rounded. The marginal edge of the preparation needs to be continuous and clearly visible. A bevel should be avoided. Due to the tooth-colored framework, supragingivial margins in the anterior or posterior regions are acceptable to achieve esthetic results.

