CAD/CAM has entered an expansion era of new materials. My top two comments about CELTRA DUO is its incredible marginal mill and polishability. CELTRA DUO has been around for a few years now and is gaining momentum in the CEREC world. This video reviews my take on this material. As clinicians, it is important that we understand the preparation and cementation protocols for materials with their clinical indications. When materials are applied appropriately we will have success.