关键词: 正畸治疗, 骨性Ⅲ类错牙合, 前方牵引器

Abstract: Skeletal Class Ⅲ malocclusion is common developmental deformity. The cause and the craniofacial structure are too complex to get the consummate diagnosis and treatment from ordinary orthodontist. About 42 ~ 63% of skeletal Class Ⅲ malocclusion is combined with varying degrees of maxillary hypoplasia， so maxillary protraction with rapidly palatal expansion is an effective treatment for skeletal Class Ⅲ malocclusion in early period. Eligible literature was reviewed and the influence of maxillary protraction assessed in skeletal Class Ⅲ subjects on soft and hard tissue， airway， and clinical application.

Key words: orthodontic treatment, skeletal Class Ⅲ malocclusion, maxillary protracting appliance