Lava Crown
and Bridges
and Bridges
Many Procedures Remain the Same
With 3M tm ESPE tm Lava tm crowns and
bridges, you provide high-quality
restorations to your customers. In
addition to natural esthetics 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.
With 3M tm ESPE tm Lava tm crowns and
bridges, you provide high-quality
restorations to your customers. In
addition to natural esthetics 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
Material of the Future
Unlike traditional all-ceramic restorations, Lava tm restorations are made of zirconium oxide. This strong material does not
require a distinct shoulder to support the framework or to enhance the esthetics. In addition, the margins can be thinly tapered.
This means the preparation for lava restorations protects the tooth structure.
Minimal Reduction
The Zirconia used for Lava tm framework is strong enough to allow for this walls. Space for an opaque layer is not required.
Therefore, a reduction of the tooth structure based on the dimensions indicated below is sufficient.
Shoulder or Chamfer to set Precise Limits
Ideally, the preparation includes a circumferential shoulder or chamfer with a horizontal angle of at least 5 degrees. The vertical
preparation angle should be at least 4 degrees. 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. For posterior and
anterior teeth, a supragingival margin poses no problems. Due to the tooth-colored framework, very aesthetic results can be
achieved.
Material of the Future
Unlike traditional all-ceramic restorations, Lava tm restorations are made of zirconium oxide. This strong material does not
require a distinct shoulder to support the framework or to enhance the esthetics. In addition, the margins can be thinly tapered.
This means the preparation for lava restorations protects the tooth structure.
Minimal Reduction
The Zirconia used for Lava tm framework is strong enough to allow for this walls. Space for an opaque layer is not required.
Therefore, a reduction of the tooth structure based on the dimensions indicated below is sufficient.
Shoulder or Chamfer to set Precise Limits
Ideally, the preparation includes a circumferential shoulder or chamfer with a horizontal angle of at least 5 degrees. The vertical
preparation angle should be at least 4 degrees. 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. For posterior and
anterior teeth, a supragingival margin poses no problems. Due to the tooth-colored framework, very aesthetic results can be
achieved.
Recommended preparation for anterior teeth.
Recommended preparation for posterior teeth.
Special Preparations
Unacceptable Preparations
Gutter Preparation: Margin cannot be detected
unambiguously.
unambiguously.
90 degree Shoulder: Margin cannot be detected
unambiguously.
unambiguously.
Undercuts must be avoided.
Parallel walls: In principle, parallel wall
preparations are feasible. However, a cement gap
cannot be milled in this case. This may
significantly affect the fit.
preparations are feasible. However, a cement gap
cannot be milled in this case. This may
significantly affect the fit.
Sharp incisal-occlusal edges must be avoided.
The rounding radius should be >0.4mm
The rounding radius should be >0.4mm
Divergent stumps in the bridge cannot be
milled. Due to the restricted path of insertion
inclination of the two stumps can not be
realized.
milled. Due to the restricted path of insertion
inclination of the two stumps can not be
realized.
Preparation for Lavatm Crowns and Bridges
| Digital Dental Technologies Dental Laboratory 918-252-9200 *toll free 866-933-0220 5884 S 129th E Ave Tulsa, OK 74134 |
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