Dental zirconia block hardness

The hardness of dental zirconia block is one of its important physical properties, which has an important influence on its application in oral restoration. The hardness of dental zirconia blocks can be explained from the following aspects:

First, the hardness range

Dental zirconia blocks are usually high in hardness, and the exact value may vary depending on factors such as manufacturer, manufacturing process and material formulation. Generally speaking, the hardness of domestic dental zirconia blocks is between 600\~1000MPa, and the hardness of some high-end products can even reach more than 1200MPa. The hardness of imported dental zirconia blocks, especially products of well-known brands, is often at a high level, which can meet the requirements of oral repair for material hardness.

Second, hardness test method

Hardness is the ability of a material to resist scratches or indentation, commonly used hardness test methods include Rockwell hardness test, Vickers hardness test and so on. For zirconia materials, the Rockwell hardness is usually between HRA 85 and 87, which shows that zirconia materials have a fairly high hardness level. It should be noted that different test methods and standards may have a certain impact on the hardness test results, so when comparing the hardness of different materials, you should ensure that the same test methods and standards are used.

Third, the relationship between hardness and oral repair

In oral restoration, the hardness of the material is an important consideration. Moderately hard materials can resist the wear and tear of chewing and avoid excessive wear on natural teeth. Dental zirconia block can maintain the stability and integrity of the prosthesis while bearing the chewing force with its high hardness characteristics, thus prolonging the service life of the prosthesis.

Fourth, other relevant characteristics

In addition to hardness, dental zirconia blocks also have other outstanding physical and chemical properties, such as high strength, high density, excellent wear and corrosion resistance, good biocompatibility, etc. These characteristics make dental zirconia blocks widely used in the field of dental restoration, such as making all-porcelain crowns, all-porcelain Bridges, implant abutments and so on.

To sum up, dental zirconia blocks play an important role in the field of oral restoration with their high hardness and other excellent physicochemical properties. However, it should be noted that when selecting dental zirconia blocks, comprehensive consideration should be made according to the specific situation and repair needs of patients to ensure the optimal repair effect.