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Lava™ Crowns & Bridges
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Introduction
Preparation Guidelines for Lava Crowns & Bridges
Figure #1 Anterior crown: 1.5-2.0 mm incisal reduction. 1.0-1.5 mm labial and lingual reduction. Round the internal line angles and sharp edges. Chamfer margin.
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Figure #2
Posterior crown: 1.5-2.0 mm occlusal reduction. 1.0-2.0 mm axial reduction. Round the internal line angles and sharp edges. Chamfer margin.
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Figure #3
Trough shoulder: We advise you NOT to trough (or gutter) the shoulder because the outermost edge may not be detected when scanned.
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Figure #4
Feather edge: We DO NOT recommend a feather edge, as it does not provide adequate reduction for the porcelain build-up.
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