Celtra Press MO blocks are available in MO1 and MO2. Due to their opacity, these blocks are recommended for the fabrication of restorations on vital prepared teeth or slightly discolored teeth. They are perfectly indicated for natural-looking restorations covered with Celtra Ceram using the layering technique, for crowns, and three-unit bridges up to the second premolar. The blocks are made of lithium silicate ceramic reinforced with zirconium dioxide (ZLS). Advantages: chameleon effect for excellent optical adaptation in vivo, a perfect balance between translucency and opalescence, natural opalescence to prevent a grayish hue in the mouth, high flexural strength of over 500 MPa for reliable results, excellent edge quality for greater safety in complex cases, and very good flowability due to small ZLS microcrystals.