I have done a number e.max implant abutment-crowns and they are working very well. I use them in the posterior region when the implant alignment provides a screw access retention option. A Sirona TiBase is seated and then scanned. The CEREC 4.0 scan and mill algorithms are precise enough to generate a tight/snug fit. TiBase anti-rotational factors are increased with additional preparation to the TiBase cylinder. Cervical emergence is virtually design using the Shape/Circular tool. Cementation of e.max restoration on the TiBase was accomplished with Monobond Plus and opaque Mutlilink. Video is soon coming to CEREC Liftoff Online Training for this technique.