In a method for the production of tooth restorations or tooth replacement parts from a non-metallic, inorganic material firstly a modelable material is modeled in plastic form in the mouth of a patient or with use of a model to a shaped part. A set of protocols control communication between a host and a memory device. In addition, the optical assembly includes an active cooling device that is in thermal contact with the first and second semiconductor optical devices. Each of the sheets of foldable paper have a foldable structure in which at least one folding portion is formed on the upper edge of each of the sheets of calendar paper.