Here's a pictorial of a case where I replaced a failing amalgam on tooth No.30 with a full-contour zirconia crown designed and milled in the dental laboratory with the 3M ESPE Lava CAD/CAM system.
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 The patient presented with a failing amalgam on tooth No. 30. The site was isolated with rubber dam.
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 Amalgam was removed and caries detection dye was used to check for any remaining decay.
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 After placing a glass-ionomer core buildup for reinforcement, double retraction cord was placed.
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 The site was lightly dusted with titanium dioxide powder to facilitate scanning the preparation and adjacent teeth with the Lava C.O.S. scanner.
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 The top cord was removed and the digital impression was taken.
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 The margin was reviewed in the standard view…
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 …and the 3-D view.
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The restoration was designed in the lab on the 3-D virtual model. Here is the operative quadrant, where the well-defined margin is visible.
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The virtual model of the opposing arch…
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 ….is articulated to ensure proper occlusion.
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 The provisional is placed.
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  The final restoration fits perfectly with no chairside adjustment necessary. |