The invention relates to cationic dental compositions that are stable and highly loaded. This dental composition comprises: (1) at least one functionalized silicone ethylene oxide that is reactive cationically and under UV; (2) at least one dental loading material (SiO2); (3) a dispersant based on a polyurethane/acrylate copolymer salified by an alkylammonium whose amine index is less than 100 mg of potash per gram of dispersant; (4) a cationic photoinitiator (iodonium borate), and; (5) a photosensitizer. These dental compositions can be used for producing dental prostheses and for dental restoration.