The hazards of zirconia all ceramic teeth, the advantages of zirconia all ceramic teeth

It is certain that the zirconia porcelain crown is an inorganic substance (if you are sure that it is a zirconia crown), and it does not react with the body in any way, and the fatigue problem is more likely to be caused by the loss of water caused by the mouth opening time for too long during the operation, and the food stasis caused by the insufficient fit of the zirconia crown, and finally the intake of chronic immune substances. Of course, if you have a preoperative liver function blood test, you can compare it with another liver function test after surgery, and if you don't have one, you can directly do a blood test to rule out the possibility of hepatitis infection.

There is a slight hazard. The hazards are as follows:

1. Zirconia porcelain teeth will break porcelain when they are stressed beyond its stress range, so don't bite into foods that are too hard, such as walnuts and the like.

2. The joint between zirconia porcelain and abutment teeth is easy to accumulate plaque and form tartar, so attention should be paid to keeping the mouth clean, developing the habit of brushing teeth after meals, flossing can be used between the teeth, and regular visits to the hospital for examination and cleaning.

Zirconia porcelain tooth is a mineral found in nature as oblique zircon. Its density and strength are very high, and the strength is twice higher than that of the Empress II.

Generally speaking, porcelain teeth made in regular hospitals are rarely harmful, and problems are generally made in irregular hospitals.

The possible hazards of porcelain teeth in irregular hospitals are:

1. Pain: The porcelain tooth fit is not good, and the grinding is too strong when preparing the tooth, which damages the dental nerve of the real tooth.

2. Unsatisfactory shape: The doctor's aesthetic plan is not well designed, and the design is not matched according to the patient's skin color and adjacent teeth. The shape and position of the tooth itself is not good, and it is not improved after cosmetic restoration.

3. Poor chewing: The doctor's repair plan is not well designed, and the bite relationship is not properly designed. The occlusal point of the porcelain tooth is too high.

4. Distortion of porcelain teeth: the doctor's aesthetic plan design is not good (including tooth color, skin color matching, etc.); Porcelain tooth material reasons (metal porcelain tooth has poor light transmittance and does not look transparent).

1. The difference in materials.

The full name of cast porcelain tooth is cast ceramic full crown, also known as full porcelain tooth. It is made of a new ceramic material that can be cast, and is superior to metal porcelain teeth in terms of appearance and biological properties. The biggest difference between them is the inner crown.

The inner crown of the cast porcelain tooth is porcelain, which is a transparent skeleton with no metal base layer.

Zirconia ceramics are white, yellow or gray when containing impurities, and generally contain HFO2, which is not easy to separate. There are three crystalline states of pure Zro2 at atmospheric pressure.

The production of zirconia ceramics requires the preparation of high-purity, good dispersion performance, ultra-fine particles, narrow particle size distribution of powder, zirconia ultrafine powder preparation methods, zirconia purification mainly includes chlorination and thermal decomposition method, alkali metal oxidation decomposition method, lime melting method, plasma arc method, precipitation method, colloidal method, hydrolysis method, spray pyrolysis method, etc.

2. The difference in production process.

The cast porcelain all-ceramic tooth adopts the traditional lost-wax casting method, but the metal is replaced by the finished porcelain block, and the inner crown is lithium silicate porcelain vacuum high temperature casting molding, and the casting process adopts a vacuum casting machine. The all-porcelain inner crown and the outer layer of porcelain powder are chemically bonded and have high strength. The bending strength of cast porcelain teeth is 420MPa, and its wear resistance is close to that of natural teeth, and it will not wear too much on the jaw teeth.

The production method of zirconia all-ceramic teeth is divided into two types: manual processing and computer numerical control processing.

3. Adapt to the conditions of restoration.

The amount of tooth tissue to be ground out of the cast porcelain tooth is more than that of the porcelain crown, otherwise the porcelain layer is too thin and easy to break. The strength of cast porcelain teeth is not as high as that of porcelain teeth, and they are generally only used for single crowns, inlays, onlays and veneer restorations of anterior teeth, and are not used for posterior restoration.

Zirconia ceramic is a yttrium-stabilized zirconia ceramic with high flexural strength, the only disadvantage is that it is not suitable for bridges with missing free ends and bridges with more than six or so (depending on the conditions) teeth, because it lacks the toughness of metal.

The advantage of zirconia all-ceramic teeth is that there are no metal ions free in the soft tissues of the gums.