Last night I attended the first Dentinal Tubules "prep evo" roadshow study club. It was a brilliant few hours with some great learning from the fantastic teacher Mahul Patel via video.
The idea is that you are tasked with preparing a tooth for a crown how you normally would, then he teaches you what you should be aiming for and his recommendations about how to achieve that. Then you get to try again. Each time you get to see the results in great detail via a Cerec scanner and can quantify how close you got to an "ideal" prep by Mahul himself.
If you have the opportunity to go to one of these events in the next few months I would strongly recommend it. Details can be found via Dentinal Tubules.
Dr Chris Harper