Rich Rosenblatt The beauty of doing CEREC restorations is my ability to be conservative with my axial reduction. I don't have to take my preps to the gingival margin, especially with HT (high translucency) blocks where the margins tend to disappear. I like to prep with some sort of ferrule but I don't need 4-5mm of it because I'm bonding. The higher I leave my margins the more enamel I have to bond to. The problem that arises, especially when using emax and having to support the margins properly, is having a restoration that is difficult to balance on the firing pegs. I'm including some photos of what I tend to do when I come across this scenario. I love the new emax shortened firing cycle and the new tray that comes with it. This restoration depicted had very limited axial reduction. Approximately a 1-1.5 mm ferrule exists.
What I like to do is to take the object fix to support the restoration and place that combo directly on the tray with no firing pin. I support the margins and then do my characterization while holding the tray.
This will help a great deal when doing flatter crowns or partial coverage inlays and onlays.
