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AssigneeVEB Kombinat Medizin- und Labortechnik Leipzig
InventorsWolfgang Fischer, Gerhard Gehre, Rainer Korf, Renate Lorenz, Heinz Taschner
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The invention concerns a snugly fitting denture such as bridges and the like, consisting of a metallic foundation and of a ceramic facing shell as well as a process to its manufacture. It is the object of this invention to develop a compact system for a snugly fitting denture with high firmness and mechanical loading capacity as well as with prolonged durability under the conditions prevailing in the oral cavity. This is achieved by the fact that the metallic foundation consists of a base metal alloy with a silane-content of .ltoreq.0.5% and that the ceramic facing shell is provided with a silicon-coupled adhesive plastic part. The metal base is silanized in an ultrasound bath, highly fluid prosthesis plastic is applied to its labial aspect and the facing shell is pressed-on. Thus a solid chemical bonding develops between foundation and facing shell. This compact system is without slits and does not offer any possibilities of aggression to harmful influences existing in the milieu of the oral cavity.
A process of producing a snugly-fitting denture, comprising
A snugly fitting denture, comprising a metallic foundation, said metallic foundation being essentially composed of a dental base metal alloy having a silicon content of less than 0.5%, a first silane layer disposed on said metallic foundation, a first plastic layer disposed on the labial aspect of said first silane layer, whereby said first plastic layer is attached to said metallic foundation by said first silane layer, said first plastic layer comprising a tooth colored prosthesis plastic having an ascension-ratio such that the prosthesis plastic has the consistency of a highly fluid substance, a second plastic layer disposed on said first plastic layer, said second plastic layer being an adhesive plastic portion which is firmly bound to said first plastic layer by cold polymerization of said first plastic layer, a second silane layer disposed on the side of said second plastic layer opposite to said first plastic layer, and a ceramic facing shell, said ceramic facing shell being coupled to said second plastic layer by said second silane layer.
Dependencies are inferred from the claim text.