The invention relates to lithium silicate glass ceramics and lithium silicate glasses which have a content in special oxides of divalent elements, which crystallize at low temperatures and which are particularly suitable as dental materials.Se describen cerámicos de vidrio de silicato de litio y vidrios que contienen óxidos específicos de elementos divalentes que cristalizan a temperaturas bajas y son apropiados en particular como materiales dentales.