The first use of zirconia was in a high strength ceramic family named In-Ceram, by Vita Zahnfabrik. Zirconia was a constituent of the highest strength In-Ceram intended to be used as a posterior restorative. It was combined with alumina to achieve a flexural strength of 700MPa, nearly double that of the glass ceramic materials. The one drawback: though strong, it was not very translucent, and therefore was relegated to posterior crowns and bridges. The introduction of CAD CAM milling put automation within reach and the industry went for it in a big way. When CAD CAM met millable zirconia, a revolution happened. Suddenly, restorative materials could be made easily and had flexural strengths that exceeded 1,000MPa.