Dr. L. asks:
How accurate is the new Cerec 3? I tried the Cerec 1 and 2 and found that margins were not sealed at the proximal box floor level. These gaps concerned me. I could feel them with the tip of a sharp explorer. I am concerned that over time, marginal gaps in a critical area like the proximal box might lead to failure. I have considered trying the Cerec 3, but it is cost prohibitive. I believe I may be able to train one of my assistants to plan the fabrication of the restoration while I work on another patient. I am thinking that in a 2-hour appointment we can prepare the tooth, make the restoration and cement it. For those of you using the Cerec 3, how accurate is it? Are you able to train one of your technicians or assistants to use it?
Cerec 3 : How Accurate Is It?
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The Cerec 3 makes an excellent,accurate restoration equal to any traditonal restoratin.This is true if and only if the preparation and picture are perfect,and I mean Cerec perfect.The preps for inlays and onlays are different than those for gold.The boxes can’t have sharp angles though the walls do flair,however the walls of the occlusal must be undercut.Then take a perfect picture.The learning curve isn’t short.
The computer design is the easiest part and can be delegated to an assistant so you can be seeing another patient while the design and milling processes are going on.
You may also want to look at the E4D by D4D. It eliminates the powder coating which, it seems to me, adds an additional source of error.