Porcelain teeth is a restoration that mainly treats the restoration of chipped and missing teeth, and is generally divided into metal porcelain teeth and non-metal porcelain teeth. General porcelain teeth is no harm, if improperly made, there will be some symptoms appear. 1, if the edge of the porcelain teeth appear overhang, in the location of the overhang is easy to accumulate bacteria, which will cause gingivitis and periodontitis. 2.If the porcelain teeth and the abutment teeth are not close together and there is a gap, then, it will cause the decay of the abutment teeth. And this kind of decay, not easy to be found, will lead to the decay of the abutment teeth more and more serious. 3.After the metal porcelain tooth is long, the edge of the gum will appear black coloring. And for patients who do head MRI, metal porcelain teeth will have artifacts, and need to remove porcelain teeth before MRI examination. 4, if the teeth are not properly prepared, not to meet the requirements of the preparation, then the porcelain teeth also have the chance of falling off. If the patient’s bite is more serious, the bite force is relatively large, porcelain teeth will also cause chipped porcelain. Porcelain dental restorations are a treatment for dental disease, so there is generally no harm. If the tooth is missing to a certain extent, it is recommended that you can have porcelain teeth restored to restore the shape and chewing function of the teeth.