Abstract: Class Ⅲ malocclusion refers to forward position of the first molar. Class Ⅲ malocclusion has an impact on maxillofacial growth，oral function，facial appearance and mental health，etc. Class Ⅲ malocclusion in primary dentition，tends to become heavier with the growth of jaw，and the treatment becomes more challenging. There are rarious treatments for Class Ⅲ malocclusion. This paper reviews the etiology，the morbidity，the harm，the diagnosis and treatment of Class Ⅲ malocclusion in primary dentition.

Key words: primary dentition, Class Ⅲ malocclusion, early intervention

摘要： 安氏Ⅲ类错牙合畸形是指上下第一磨牙呈近中关系，其对患者的颌面部生长发育、口腔功能、颜面美观及心理健康等有一定影响。乳牙期安氏Ⅲ类错牙合畸形程度会随着患儿颌骨的生长发育逐渐加重，矫治难度进一步增加。乳牙期安氏Ⅲ类错牙合畸形矫治方法多样。文章就乳牙期安氏Ⅲ类错牙合畸形的患病率、病因、危害、诊断及矫治方法等做一综述。

关键词: 乳牙期, 安氏Ⅲ类错牙合畸形, 早期矫治