The invention relates to a polysiloxane compound comprising specific siloxane units, curable dental materials comprising one or more than one polysiloxane compound according to the invention, cured dental materials obtainable from the curable dental materials according to the invention, a method for preparation of polysiloxane compounds according to the invention, a method for preparing curable polysiloxane compounds according to the invention and a method for preparing cured dental materials according to the invention.