错n 畸形是仅次于龋病和牙周疾病的第三高发口腔疾病，随着文化和社会经济水平的不断提高，人们对正畸治疗的需求逐年增加。正畸固定矫治最常见的并发症——早期龋，已经严重挑战龋病预防和正畸治疗的美学效果，值得医患双方高度重视并采取有效的防治措施。n “,”Malocclusion is the third most common disease in the human oral cavity, closely behind caries and periodontal diseases. Along with the cultural and socio-economic progress, demands for orthodontic treatment is increasing year by year. However, the early stage caries, a most common complication in patients receiving orthodontic treatment using fixed appliances, has become a serious challenge to the prevention of dental caries and the esthetic outcome of orthodontic treatment. It deserves both dental workers and patients to pay attention and to take preventive and therapeutic measures on this issue.