Porcelain and all-porcelain teeth in the degree of strength and the use of years there is not much difference, all-porcelain teeth may be more wear-resistant performance, but the use of about 10 years, after 10 years both restorations will not be damaged, the reason for the need to replace, because the bonding agent in the oral cavity in about 10 years will dissolve, resulting in a gap between the restoration and the abutment teeth, no longer close, if not replaced. If not replaced, it will easily cause damage to the abutment teeth. Porcelain teeth and all-porcelain teeth, the biggest difference is that porcelain teeth in the head MRI is required to remove, because it will produce artifacts, affecting the results of the MRI, all-porcelain teeth do not need to remove, and porcelain teeth within the metal precipitation, easy to cause gum staining, if located in the body for a long time, easy to lead to other changes in the body, there is not yet much medical conclusive. It is recommended that patients should try to choose all-porcelain restorations when possible, its biocompatibility is better.