Safety of dental zirconia blocks？

The safety of dental zirconia blocks has been verified and supported in several aspects, and the following is a detailed analysis of their safety:

First, biocompatibility

Non-toxic and harmless: Zirconia is a non-toxic material that can be safely used in medical and dental applications. A large number of experiments and clinical cases have proved that zirconia has no toxic damage to bone and soft tissue cells, and no allergic reaction has been reported.

Non-metallic materials: Although zirconia contains metallic elements, it is actually an oxide ceramic, which is clearly different from metal. This material does not produce a metallic odor in the mouth, nor does it irritate the gums or cause allergic reactions.

Second, radioactivity

Low radioactivity: Zircon from zirconia source needs to go through multiple steps such as purification treatment and powder processing, and all impurities will be removed during the processing. 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.

Strict standards: The State Food and Drug Administration has strict standards for all ceramic materials on the market, and only after meeting the requirements of radioactivity experiments can they be used as medical materials. This ensures the safety of dental zirconia blocks.

Third, physical properties

High strength: Zirconia has a high bending strength, and the strength of materials registered in China has reached 900MPa, which is much higher than the national standard for dental materials (100MPa). This makes zirconia porcelain teeth have higher durability and can withstand greater bite force.

Rupture resistance: Zirconia has unique rupture resistance and strong curing properties after rupture, which makes it advantageous in the production of long bridge restorations. At the same time, the incidence of porcelain breakage is not high, and it mainly occurs in the interior of the decorative porcelain rather than the interface between the decorative porcelain and the zirconia substrate crown.

Fourth, aesthetics

Good transparency and refraction: zirconia porcelain teeth have good transparency and refraction, and will not appear black lines in the neck of the teeth, making the repaired teeth close to the natural teeth in terms of aesthetic effect.

Fifth, other considerations

Price: Due to the high cost of zirconia material and its production process, the price of zirconia porcelain teeth is relatively expensive.

Production accuracy: The production of zirconia full porcelain teeth requires a precise design, production and installation process, which requires doctors to have high technical and equipment conditions.

In summary, dental zirconia block has excellent performance in biocompatibility, radioactivity, physical properties, aesthetics and other aspects, and is a safe and reliable dental repair material. However, in the selection and use still need to pay attention to the doctor's technical level and equipment conditions and other factors.