Porcelain teeth after a few years of root exposure need to remove the crown to consider remaking, for periodontal inflammation, periodontal treatment is also needed to stabilize the periodontal situation. 1. Remake: After wearing porcelain teeth for several years, the roots are exposed, the edge of the crown will not be close to the tooth, which will easily cause tooth sensitivity, or lead to tooth decay, so it is necessary to remove the crown and then re-crown restoration, so that the edge is close to the tooth. 2. Evaluation of periodontal status: Porcelain teeth wear a few years after the root exposure is often accompanied by periodontal inflammation, periodontal inflammation will lead to gum recession, so in the removal of the crown if found to have periodontal inflammation, the need for periodontal treatment, removal of gingival gums tartar, to eliminate the inflammation of the gums, control the gums continue to recede. Crown removal needs to be carried out in a regular dental hospital to avoid damage to the dentin and periodontal tissues.