Method for producing large polymerised dental material blocks

Method for the production of a three-dimensional dental block of material from a dental, polymerisable material, wherein the block of material is suitable for the production of dental prosthetic parts in a material-removing process, comprising the steps of

• a) optionally:
• setting the viscosity,
• b) transferring the polymerisable dental material into a radiolucent three-dimensional casting or press mould,
• c) optionally:
• planarising at least one surface of the dental material in the three-dimensional casting or press mould forming a defined three-dimensional geometry of the material, and/or
• d) optionally application of pressure to the polymerisable material in the three-dimensional casting or press mould,
• e) irradiating the polymerisable dental material substantially from all sides with light in the UV/Vis spectral region forming polymerised outer surfaces of the dental material in the form of a solid outer, closed shell of the dental material, wherein the shell is present in the defined three-dimensional geometry of the material whilst the inner region of the material is not polymerised,
• f) removing the dental material with dimensionally stable shell having defined three-dimensional geometry out of the casting or press mould,
• g) performing thermal polymerization by heating the material with solid shell being present in defined three-dimensional geometry, to 60° C. to 150° C. for at least 90 minutes,
• h) optionally:
• cooling the completely polymerised material,
• i) obtaining a dental, completely polymerised block of material having defined three-dimensional geometry.