For Different Types Of Porcelain Powder Or Porcelain Block, If The Chemical Composition Of One Type Of Product Can Cover Other Types Of Products, Is It Possible To Select Only The Type Of Product For The Biocompatibility Test?

For different types of porcelain powder or porcelain block, if the chemical composition of one type of product can cover other types of products, for example, A has 10 components and B has 8, all of which are included in the composition of A, and the content of each component contained in B has no increased risk compared with that in A, then it is allowed to select only A for the biocompatibility test. And it is necessary to provide the supporting data demonstrating the influences of differences in the total contents of components between B and A on the safety of the material.