儿童期咬合紊乱不仅影响牙齿的正常萌出和替换，还影响颌面部骨骼、肌肉的正常发育和口腔功能，甚至可影响儿童的心理健康。 因此，对儿童期咬合异常的早期诊断和治疗受到国内外学者越来越多的关注。 早期矫治的目的是引导颌面部骨骼和肌肉的正常发育、防止乳牙间隙的丢失、顺利完成恒牙列的替换。 多数病例可以通过简单的早期矫治恢复正常的咬合和口腔功能，无需在恒牙列替换后再进行复杂的矫正治疗。 即使是复杂的病例也可通过早期治疗减小错程度，简化后期治疗或避免进行拔牙减数治疗及外科正颌手术治疗。 本文就儿童期常见错 畸形的矫治时机和预防进行讨论。

Occlusive disorder in young children can affect children's succession of decideous teeth，development of the jaw and oral function，as well as the facial appearance and mental health of children. The clinical doctors and scholars have paid more attention to the occlusal abnormalities present in the early age of children. The fundamental goal of early orthodontic treatment，also known as phase one of or preventative orthodontics，is to guide the growth and development of the children's jaw so that there is enough room for permanent teeth to come in straight. We consider that initiating early treatment is reasonable and eminently logical，since it is allows partial or even total correction of an evolving orthodontic anomaly in a growing child. Such early therapy is often brief by using simple appliance，eliciting little cooperation from patients and their parents，and preventing the anomaly from worsening.This paper is to discuss the early interceptive approach to different orthodontic anomalies.