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Zirconium oxide sintering pure porcelain teeth

A technology of zirconia and porcelain teeth, which is applied to dentures, etc., can solve the problems that the optical properties cannot meet the aesthetic effect of patients and dentists, the metal inner crown is opaque, and the gums are blue. The effect of small sintering shrinkage

Inactive Publication Date: 2009-12-30
王玉元
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Dental restorations include metal porcelain and all-ceramic. Due to the opacity of metal crowns, the optical properties cannot satisfy patients and dentists in pursuit of the aesthetic effect of natural teeth. Metal allergies, red and swollen gums, and blue gums have appeared in metal porcelain all over the world. Too much metal in the mouth can also produce electromagnetic effects

Method used

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Embodiment Construction

[0013] Below in conjunction with embodiment describe in detail.

[0014] 1. Burn zirconia, a commercially available raw material, to a molten state of 1900°C, use compressed air to disperse and granulate, and sieve and classify to obtain porcelain powder for use. Sintering to 1900°C has the least shrinkage.

[0015] 2. The maximum shrinkage rate of zirconia raw material is sintered to 1350°C, so when the raw material zirconia must be fired to 1500°C, the sintering at this time is still not strong enough, especially the sintered body obtained by putting the heat into cold water is not good enough. Sturdy, ground made of industrial zirconia can be ground into a slurry, suitable for dental production methods with low volume, which may have 3% shrinkage, which can be counteracted by plaster mold expansion of 3%. If it is fired to 1400 ° C, grinding can be avoided, but the shrinkage is slightly larger, reaching 5%.

[0016] 3. Cobalt complex alloy embedding material, which is ava...

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Abstract

The invention relates to a method for using zirconia to sinter full-ceramic tooth, which uses zirconia powder to be sintered at 1500-1900Deg. C to obtain the zirconia ceramic powder, to be grinded into powder or pulp, then adds some sintering agent and flexibilizer, to be sintered in mold secondary to obtain the full-ceramic tooth. The invention has simple process, less contraction, high strength, and low cost as 2% of foreign product.

Description

technical field [0001] The invention relates to a dental prosthesis and a manufacturing method thereof, in particular to a dental prosthesis, which is especially suitable for restoration of all-ceramic crowns, all-ceramic studs and all-ceramic inlays. Background technique [0002] Over the past 100 years since the advent of all-ceramics, there have been die-cast ceramics, glass ceramics, alumina ceramics, etc., and zirconia ceramics have the highest flexural strength, which is also a hot spot in the international dental market today. [0003] Dental restorations include metal porcelain and all-ceramic. Due to the opacity of metal crowns, the optical properties cannot satisfy patients and dentists in pursuit of the aesthetic effect of natural teeth. Metal allergies, red and swollen gums, and blue gums have appeared in metal porcelain all over the world. Too much metal in the mouth can also produce electromagnetic effects. Now developed countries have increased the production...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61C13/083
Inventor 王玉元王粤凡
Owner 王玉元
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