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The picture shows an expert doctor in a hospital treating the patient!
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This case has attracted the attention of many dentists
Because of obstruction of MRI = unable to save lives at the first time!
every minute counts!
Therefore, when the majority of dental patients choose to make metal braces and all ceramic braces,
Most doctors will advise
Materials that do not affect MRI, CT and X-ray should be preferred
The most reliable choice - Zirconia all ceramic teeth
At the same time, metal ceramic teeth are unstable under the action of bacteria in the liquid oral acid-base environment, and the metal interferes with patients when doing CT NMR. Therefore, the dental medical community has been trying to change this state. At present, the latest ceramic teeth without metal crowns - Zirconia all ceramic series are popular in the international dental community.
Is zirconia safe?
Zirconia used in medicine and dentistry performs very well in terms of biosafety. Over the years, a large number of experiments and clinical cases have proved that zirconia has no toxic damage to bone and soft tissue cells. No allergic reaction has been reported.
1. Zirconia is sometimes mistaken for a metal. This is a confusion between the chemical concepts of metal elements and metals. Zirconia is not zirconium metal or zircon. Although it contains metal elements, it is oxide ceramics. This is like the difference between sodium chloride (the chemical composition of table salt) and metallic sodium;
2. Patients are worried about whether zirconia is radioactive. In fact, zircon from zirconia needs to be purified, processed and other steps, and all impurities will be removed in the processing process. The standards of the State Food and drug administration have strict standards for all ceramic materials on the market. They can be used as medical materials only after they meet the requirements of radioactive experiments. Moreover, there are requirements not only for zirconia, but also for decorative ceramics, alumina, glass ceramics, etc. Experiments show that the radioactivity of pure zirconia powder is not only less than that of glass ceramics, but also lower than that of human bone tissue.
Zirconia restoration
Is the porcelain breaking rate high?
A large number of studies have shown that the incidence of porcelain disintegration of zirconia is not higher than that of traditional porcelain fused to metal restorations. The study found that the porcelain disintegration of zirconia mainly occurred in the interior of the decorative porcelain rather than at the interface between the decorative porcelain and the zirconia base crown. There are three main reasons for porcelain collapse:
1. The shape design of the bottom crown is poor, and the porcelain decoration on the local surface is too thick;
2. The sintering of decorative porcelain is not controlled according to the standard, such as rapid cooling;
3. The doctor did not carry out reasonable treatment after jaw adjustment, such as re glazing and sintering, or standard three-step polishing, etc These are all necessary steps.
The hardness of porcelain teeth and zirconia teeth is high PK, and the collapse of teeth is tested
For some patients with tight occlusion and insufficient space for tooth preparation, full zirconia restoration is a good choice. If you are worried that it will cause excessive wear to the jaw teeth, it is not necessary, because the wear performance of zirconia depends on the smoothness of the surface, not the hardness. Therefore, after polishing or glazing, the full zirconia restoration will not cause excessive wear to the jaw teeth. After grinding, please submit it to the technician for glazing or self polishing.
1. Low radiation
Zirconia is a mineral in nature, which exists in the form of clinopyrite. A small amount of medical zirconia remains in zirconium after cleaning α The penetration depth of the residual rays is very small, only 60 microns.
2. High density, high strength, no metal inner crown.
With unique fracture resistance and strong curing performance after fracture, it can make porcelain bridges with more than 6 units, which solves the problem that all ceramic systems cannot be used as long bridges. Although there is no metal support, it has high strength, refractive index is basically close to natural teeth, dense edges and high precision, which has excellent aesthetic effect
(1) Zirconia ceramics are yttrium stabilized zirconia ceramics with high bending strength. At present, the strength of materials registered in China has reached 900MPa, while the national dental material standard is 100MPa.
(2) Compared with other all ceramic restorative materials, the strength advantage of zirconia material enables doctors to achieve extremely high strength without too much grinding of patients' real teeth. Among them, Vita all ceramic plus yttrium stabilized zirconia is known as ceramic steel.
3. Excellent aesthetic effect
The successful all ceramic tooth restoration is lifelike and beautiful in appearance, strong and wear-resistant, and its color is similar to natural teeth. It has good biocompatibility, does not stimulate oral tissue, and is easy to clean. It can not only restore the function of teeth, but also have the effect of beauty. The most important thing is that all ceramic teeth have good transparency and refraction, and there will be no black lines in the neck of the teeth, so that the neck of the teeth can also achieve a good aesthetic effect, which is unmatched by general porcelain fused to metal teeth.
4. Most reliable
There is no metal odor. When contacting with air, water or any other electrolyte, micro oxide film will be produced quickly, which can not only avoid metal corrosion, but also prevent the generation of metal odor.
In addition, non-metallic zirconium dioxide has no barrier to X-ray. As long as zirconium dioxide porcelain teeth are inserted, there is no need to remove false teeth when doing skull X-ray, CT and NMR examinations in the future, which saves a lot of trouble. This article previously reported that "teeth hinder MRI? That's because you don't use zirconia teeth"
5 good biocompatibility
Zirconia is an excellent high-tech biomaterial with good biocompatibility, which is superior to all kinds of metal alloys, including gold. Zirconia has no irritation and allergic reaction to gums, which is very suitable for oral application, and avoids the adverse reactions such as allergy, irritation and corrosion caused by metal in the oral cavity.
6. High quality
Zirconia all ceramic teeth are not only expensive because of their materials and equipment, but also because they are made by using the most advanced computer-aided design, laser scanning, and then grinding by computer program control. It ensures the accuracy and excellent edge tightness of the crown in the mold, makes the porcelain teeth made very close to the patient's intraoral abutment teeth, and greatly reduces the incidence rate of periodontitis after restoration.
In addition to the relatively expensive price, zirconia all ceramic teeth have no obvious shortcomings compared with all other similar restoration methods
In general, the porcelain teeth made of zirconia material are the best porcelain teeth at home and abroad, and the material itself has no shortcomings.
Once there was a popular saying on the Internet, "do you need to buy a porcelain tooth or a good dentist?", That is to say, porcelain fused to metal teeth have high requirements for doctors' technology and equipment in all aspects, so we must choose powerful clinics or hospitals to make zirconia porcelain fused to metal teeth, and only in this way can we achieve the best repair effect.
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