牙齿变色是一种常见病、多发病,可由牙齿发育障碍、药物使用不当、牙髓坏死等多种原因造成。常用的治疗方法包括采用脱色剂对其脱色、用树脂或瓷贴面进行遮盖以及采用金属——烤瓷冠或全瓷冠进行修复,以达到恢复牙齿美白的目的。其中采用脱色剂对变色牙脱色因不需磨除牙体组织,操作简便,副作用小常常成为临床医师和患者的首选。 Tooth discoloration is a common disease, frequently-occurring disease can be caused by dental development disorders, improper use of drugs, pulp necrosis and other causes. Common treatments include decolorizing with decolorants, masking with resin or porcelain veneers, and restoration with metal-porcelain crowns or all-ceramic crowns to restore tooth whitening. Among them, the decolorizing agent decolours the discolored tooth because it does not need to abrade the tooth tissue, and has the advantages of simple operation and small side effect, which is often the first choice of clinicians and patients.