Reader Mr. Chen asked: I made a few porcelain teeth in a clinic, after which my gums swelled very badly. A: Some patients have red, swollen, bruised and blackened gums after having porcelain teeth, which brings unnecessary troubles to their lives. The main reasons for these adverse reactions are as follows: 1. Improper mastery of indications. Making porcelain teeth should choose healthy, non-inflammatory teeth or roots, if the original inflammation and swelling of the gums are not eliminated, the inflammation of the gums will be more likely to be prolonged. Therefore, before making porcelain teeth, perfect periodontal treatment should be carried out first, so that the gums are completely restored to health. Sun Huiqiang, Department of Restorative Dentistry, Shandong University Stomatology Hospital 2. Informal operation has caused damage to the gums. The production of porcelain teeth requires the selection of specialized instruments, the use of formal techniques and in strict accordance with the precautions of the operation. If the technique is not skillful, it is easy to hurt the delicate gums during the operation, resulting in gum swelling in the future. 3. The incorrect shape of the porcelain teeth leads to adverse stimulation of the gums. The edge of the porcelain crown should be smooth, continuous and harmonized with the shape of the root, and the root of the tooth is closely connected. Crown edges that are too thick, too thin, not smooth, or have gaps between the crown and the tooth can cause irritation of the gums and lead to gum swelling. 4. Porcelain teeth selected materials on the gums caused by stimulation. Domestic previously made porcelain teeth metal layer is mostly made of nickel-chromium alloy (a kind of stainless steel), nickel-chromium alloy in the nickel ion is not stable, easy to free to the gums, so that the gums red, swollen, pain, but also make the gums greenish gray. Porcelain teeth after the appearance of red and swollen gums, the first should be used in routine periodontal treatment, remove the gums and neck of the tartar and plaque, and mouthwash rinse; if there is no effect, it is necessary to remove the porcelain teeth, replace the edge of the good shape of the temporary crown to do a period of time for observation; if the gums are still swollen has not been improved, then you need to use the gingivectomy of hyperplasia of the gingival part. In addition, the application of some anti-inflammatory effect of oral ointment coated in the affected area or oral anti-inflammatory drugs will also have a positive effect.