The invention concerns dental compositions. Said composition comprises (1) a silicone crosslinkable and/or polymerizable by cationic process； (2) an efficient amount of at least an initiator such as an organometallic complex borate； and (3) a dental filler present in the composition in a proportion of at least 10 wt. % relative to the composition total weight. Said dental compositions are useful for making dental prostheses or for dental restoration.
