Dental materials, processes for their hardening and to their use

The invention relates to dental materials containing monomers and/or prepolymers which are capable of being subjected to a polymer-forming reaction. The inventive dental materials also comprise at least one initiating system and optionally comprise fillers, colorants, flow modifiers, stabilizers, ion-releasing substances as well as compounds which increase the X-ray capacity, or other modifiers. The dental materials are characterized in that the initiating system is provided such that, when exposed to oxygen, it releases species which trigger the polymer-forming reaction, and the quantity of the initiating system is proportioned such that the dental materials are sufficiently capable of flowing for at least 10 seconds after exposure to oxygen, whereupon they subsequently harden into a solid material.