All-ceramic dental crown if the adhesive is loose or edge is not close to the abutment, or the abutment tooth itself has secondary caries, the inside abutment tooth may be carious, but generally will not be carious. 1. Under normal circumstances, the edge of the all-ceramic dental crown and the abutment tooth is close, if the all-ceramic crown production is not in place there may be a margin not close to the edge of the situation, after wearing the edge of the food will appear in the situation of food inlays, resulting in food accumulation of dental tissue caries. 2. If you wear all-ceramic dental crowns used for too long, its internal adhesive may be loose, food debris will enter the crown and the abutment between the teeth, long-term residual caries will occur. If the decayed tissue of the abutment tooth is not completely removed when the tooth is prepared, the decay will continue to progress after the all-porcelain crown is worn. All-ceramic crowns need to be made in a professional dental hospital, and after wearing them, it is recommended to go to the hospital regularly for follow-up checkups.