Preparation method of 3Y-TZP ceramic paste and preparation process of complete-implant fixed prosthesis

Abstract

The invention relates to a preparation method of 3Y-TZP ceramic paste and a preparation process of an upper structure of an implant prosthesis, wherein the preparation method of the 3Y-TZP ceramic paste comprises the steps: adding 3Y-TZP ceramic powder, a dispersing agent, a defoaming agent and a flatting agent into a photosensitive resin premixed solution, fully ball-milling to form ceramic slurry, then adding a photoinitiator, ball-milling again, then adding a rheological additive, and mixing to form the 3Y-TZP ceramic paste. The preparation process of the upper structure of the implant prosthesis comprises the steps of acquiring dentition data of a patient, designing, printing the upper structure of the implant prosthesis, degreasing, sintering, applying facing porcelain and carrying out heat treatment. The 3Y-TZP ceramic paste can be used for 3D printing of the upper structure of the implant prosthesis to replace a traditional cutting process, environmental pollution is avoided, material loss is reduced, manufacturing precision is improved, and product quality is improved.

Description

Technical field: [0001] The invention belongs to the technical field of denture production, and in particular relates to a preparation method of a 3Y-TZP (yttrium oxide stabilized zirconia) ceramic paste applied to stereolithography and a production process of an implant restoration superstructure. Background technique: [0002] Due to its good mechanical properties, chemical properties, aesthetic properties and biocompatibility, zirconia is increasingly used in the processing of the superstructure of implant restorations. At present, the processing method of the upper structure of the zirconia implant restoration is mainly CAD / CAM cutting and machining of the upper structure bracket of the implant restoration, and then the surface is decorated with feldspathic veneer porcelain to form an implant with simulated color, shape and function. Superstructure of the restoration. At present, there are many problems in this technology: 1. The required shape is obtained by cutting fr...

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Problems solved by technology

At present, there are many problems in this technology: 1. The required shape is obtained by cutting from prefabricated ceramic blocks. The raw material utilization rate of this technology itself is low and the cost is high; 2. The cutting dust is difficult to reuse, which is easy to cause environmental pollution. Seriously affect the health of processing personnel; 3. Affected by the bur, the detailed processing ability is insufficient and the surface accuracy is poor; 4. The bur is seriously worn out, which increases the cost in disguise; 5. When cutting the superstructure bracket of the implant restoration with a complex shape, it may Due to the limitation of the needle angle, it is impossible to obtain the preset superstructure support of the implant restoration, which eventually leads to a difference between the finished shape of the superstructure of the implant restoration and the designed shape; 6. During the cutting process, micro-cracks may be caused, resulting in The overall mechanical properties of the structure are reduced

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