牙本质过敏症是口腔科的常见病和多发病 ,以往多采用氟化钠甘油、硝酸银等药物进行脱敏 ,但临床效果不佳 ,远期疗效更不理想。自 1 999年 1 0月至今 ,我们应用镓铝砷半导体激光治疗牙本质过敏症 ,取得了满意的临床疗效 ,现报道如下。牙本质过敏症患者 1 2 1例 ,2 0 0颗牙 ,无龋 Dentistry hypersensitivity is a common disease and frequently-occurring disease in dentistry. In the past, drugs such as sodium fluoride glycerin and silver nitrate were used for desensitization. However, the clinical effect was not good and the long-term curative effect was even less satisfactory. From January 1999 to January so far, we have applied GaAlAs semiconductor laser treatment of dentin hypersensitivity and achieved satisfactory clinical efficacy, are reported below. 121 cases of dentine hypersensitivity patients, 200 teeth, no caries