Ivoclar Vivadent Ag

Frank Frenzel

Roger Frei

Markus Geier

Thomas Baaske

Konrad Hagenbuch

Clemens Andreas Häfele

Markus Geler

A dental prosthesis is provided, manufactured from a monobloc or multibloc prosthesis blank (), which is composed of a gum-colored material () and a tooth-colored material (), which materials () are bonded to each other by bonding, polymerization and/or one-piece manufacture. The boundary surface () between the materials is wave-shaped comprising alternating grooves () and ribs () in the course of the dental arch, and radial in an oral-vestibular direction in the region of the anterior teeth () to be created. The boundary surface (), at least in the region of the molars ()—again as viewed in the oral vestibular direction—has parallel grooves () and ribs () forming troughs and crests of the waveform, or grooves () and ribs () such that they extend in deviation from parallel by at most 10 degrees, in particular at most 5 degrees, at least in the region of the molars ().

System for the manufacture of a dental prosthesis

A method is provided for producing a dental prosthesis from a blank using a CAD/CAM device, wherein the blank consists partially of base material and partially of tooth material, and a boundary surface between these materials is formed as a wave, the wave crests and wave valleys of which alternate with each other along the outer periphery of the blank. The apex of each wave crest extends substantially radially with respect to the blank. The CAD/CAM device fixes the position of a retention part, which serves to fasten the prosthesis to the alveolar crest of a patient, in particular of an external telescope, of a cover of a bar, or of an abutment in the prosthesis in such a way that it passes through the boundary surface. The retention part is fastened by means of gluing or incorporation by polymerisation.

Method for producing a dental prosthesis, blank and dental prosthesis

A dental prosthesis is provided, manufactured from a one-piece or multi-piece prosthesis blank which is composed of a gum-colored material () and a tooth-colored material (), especially each one being based on plastic material. The tooth-colored material () of the blank () has a diameter or a width of more than 5 cm and especially a substantially flat cylindrical shape with a diameter/height ratio of more than 2:1, preferably more than 3:1. The gum-colored and tooth-colored materials () are bonded together by bonding, polymerization and/or integral production. The boundary () between the materials, as viewed in the direction of the dental arch course, is wave-shaped with alternating grooves and ribs (), and in the region of the anterior arch in the vestibular direction—is of radiant shape.

Dental prosthesis

A dental prosthesis is provided, manufactured from a monobloc or multibloc prosthesis blank (), which is composed of a gum-colored material () and a tooth-colored material (), which materials () are bonded to each other by bonding, polymerization and/or one-piece manufacture. The boundary surface () between the materials is wave-shaped comprising alternating grooves () and ribs () in the course of the dental arch, and radial in an oral-vestibular direction in the region of the anterior teeth () to be created. The boundary surface (), at least in the region of the molars ()&#x2014;again as viewed in the oral vestibular direction&#x2014;has parallel grooves () and ribs () forming troughs and crests of the waveform, or grooves () and ribs () such that they extend in deviation from parallel by at most 10 degrees, in particular at most 5 degrees, at least in the region of the molars ().

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Balgach, Switzerland

Frank Frenzel