Posted December 20, 2020
By Todd Ehrlich
Basically, we are doing “high water” crowns. Meaning: the margins are kept high and dry, while only going cervically when necessary. It goes against the grain with traditional crown preparation styles, but that is based on mechanical resistance and retention forms for PFMs, gold, etc. When bonding in the final restoration at…
Posted March 18, 2020
By Todd Ehrlich
In all of the years of CAD/CAM dentistry, this discussion has always happened. “Over milling” is where the burs remove more material on the intaglio surface so that the restoration will seat without binding. The “over mill” is dependent on the prep surface, the thickness of the spacer, the bur geometry, and the angle for…
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