Over the years, "Correlation" has been a very popular design mode. It was easy, efficient, and predictable. You could copy the preoperative situation and "functional paths" of the existing tooth. The one disadvantage of this technique was that oftentimes you were copying occlusal morphology that was not ideal and "ugly," for lack of a better term. With V4.0, Correlation has been replaced with Biogeneric Copy." This design mode is more powerful than ever.

By taking the upper/lower arch, buccal bite, and preoperative situation, the software allows you to creatively draw the copy line to duplicate exactly what you want. Everything within the white line will be copied on a 1:1 basis and everything outside it will be generated by Biogenerics. You now can copy wear facets and functional paths and allow the software to create natural beauty in other areas.

Here are a couple of examples...

• What I normally do is just copy the buccal surface to record the position of the tooth and also the emergence profile. Here, I moved it a bit to the cuspal wear so you could see the effect.

• In this next example, I will capture the buccal and lingual contours while getting Biogeneric occlusal anatomy. This is a bit tricky because the adjacent teeth get in the way of the "lapping" line. So in these cases, you crop the Biocopy model in the edit model stage, and you will be able to draw the line effectively to capture what you want.

good tip there skram. If anyone wants to see the thread that we talked about this and other things in detail, visit this link:

http://www.cerecdoctors.com/discussion-boards/view/id/9238