Preparation method for forming ceramic dental crown/bridge through digital plane projection

Abstract

The invention discloses a preparation method for forming a ceramic dental crown / bridge through digital plane projection. The preparation method comprises the following steps: obtaining three-dimensional data of a dental crown or a dental bridge, scaling up and then discretely stratifying the three-dimensional data, projecting a digital ultraviolet source in ceramic slurry in a dental crown or dental bridge discretely stratified two-dimensional plane form and enabling the ceramic slurry to come into contact with photosensitive materials of ultraviolet under the action of ultraviolet plane projecting beams to be solidified, so that the liquid ceramic mixed slurry in the region is solidified; enabling the ceramic slurry outside the ultraviolet plane projection region to continuously exist in the form of liquid and automatically aligning and connecting the solidifying region on the current stratum with the solidifying region on the next stratum until all the stratified data are completed; after all the three-dimensional discrete surface data are projected, taking out a forming substrate together with a solidified sample on the forming substrate and finally obtaining the ceramic dental crown or dental bridge through the processes of high temperature sintering, and the like. The preparation method has the advantage and effect that the defect that free forming is difficult to achieve as the structure complexity is high when ceramic dental crowns or dental bridges are prepared by traditional cutting processes is avoided.

Description

technical field [0001] The invention relates to the preparation of a dental crown bridge, in particular to a preparation method of a ceramic dental crown bridge formed by digital surface projection. Background technique [0002] Ceramic crowns and bridges are the most aesthetic dental restorations. They are hard, wear-resistant, high compressive strength, natural and pure in appearance, crystal clear, lifelike in color, and close to natural teeth. The most important thing is that they are not It contains metal, is light in weight, and is more comfortable to wear. It is a more suitable choice for some patients who are allergic to metals, and the condition of teeth can still be checked through X-rays. At the same time, all-ceramic teeth have very good biocompatibility and safety performance, and are non-irritating to the gums. Generally, there will be no gingival recession, blue gums, black gum edges, red and swollen gums, etc. These advantages make ceramic teeth in the oral r...

AI Technical Summary

Problems solved by technology

However, the laser selective melting technology commonly used in the molding of ceramic materials at present often has relatively large disadvantages in laser selective sintering. Ceramic coating, its material cost is relatively high, and the forming precision and forming efficiency are greatly limited

Images