| abstract |
The present invention relates to a method for producing a dental restoration zirconia block having a color gradient of each layer due to water absorption: by adjusting the degree of penetration of the coloring solution by setting each layer of the zirconia block to a different particle size of the powder based on the property that the amount of water absorbed per hour differs depending on the particle size of the powder, a product having the same color as natural teeth and excellent aesthetic properties can be realized without performing the conventional procedure of using a coloring liquid for zirconia. |