One of the popular techniques from the old days of CEREC is the design technique Biogeneric Copy.While it’s not used as much today because of the ability to have great proposals with Biogeneric Individual, Biocopy is still popular when you want to copy a preexisting clinical situation.
An example of this might be if there is an anterior tooth with perfect contact and contours.What about the need to copy an existing crown under a partial that will accommodate the clasp and rest seat?
The technique for Biocopy is simple–take your preoperative photos in the Biocopy folder andtake your preparation pictures in the appropriate jaw folder. Two models are all you need, which the software will stitch together, allowing you to design the restoration.
I will give two suggestions that I believe every single CEREC owner should do that will make the Biocopy procedure more predictable and efficient.
First, when you image your preoperative images or model, instead of taking the images in the Biocopy folder, take the images in the Buccal Bite folder. Then after taking your preparation images, move your preoperative model from the Buccal Bite folder to the Biocopy folder.
The reason for this is that when you take your preparation images and there is already a preoperative model in the Biocopy folder, the software will attempt to render your preparation model AND stitch your rendered model to the Biocopy model.
This essentially can take up unnecessary resources of the software, resulting in the need for excessive processing time of the models.
If you take your images in the Buccal Bite folder, the software can render the preparation model without having to worry about trying to stitch it with the Biocopy. Once your prep model is finished, simply move your preoperative model from the Buccal Bite folder to the Biocopy folder. You will find that the stitching is almost instantaneous.
The second tip I will give is whenever doing Biocopy, always verify your stitch. Immediately after the Model Axis step, click on Display Objects and turn your prep and Biocopy models on. You will see an overlaying of the two models. If they stitch together properly, you should see speckling of the two models where they overlap each other.
Hopefully these two tips will result in stress-free and predictable Biocopy cases each and every time.