What does a single glass phase mean? (Ceramir CAD/CAM)

The Ceramir CAD/CAM BLOCKS are manufactured through a process of laser sintering and vitrification. Through this process the glass particles are fused, and the final product consists of a single hybrid glass phase embedded in a resin matrix.

The result is a highly aesthetic material with a translucency similar to felspathic glass ceramic without having the brittleness of a pure ceramic material.