If a porcelain tooth is found not to fit, the most obvious feeling inside the patient’s mouth is a gap between the porcelain tooth and their own dental tissues, and the possibility of loosening and falling off. Porcelain teeth do not fit, a variety of reasons may cause, including the precision of the doctor when preparing the teeth, as well as taking the mold, processing errors in the production process, or the thickness of the adhesive in the process of wearing, may cause porcelain teeth do not fit. In general, once the porcelain teeth do not fit together, it is necessary to replace the porcelain teeth as soon as possible, or to re-bond the porcelain teeth. When patients have obvious porcelain teeth loosening, falling off, and gaps with the abutment tissue, they should go to the hospital as soon as possible.