关键词: 前牙反牙合, 安氏Ⅲ类, 骨性与非骨性, 上颌前方牵引

Abstract:

Anterior cross-bite is a common malocclusion in the primary and mixed dentition. It is one of the major symptoms of Class Ⅲ malocclusion. Anterior cross-bite in the Class Ⅲ malocclusion is classified as skeletal or non-skeletal，for which differential diagnosis is of vital importance for the treatment selection and prognosis judgment. The treatment techniques for anterior cross-bite in the primary dentition include occlusal adjustment of primary canines，mandibular inclined plate，maxillary appliance with bite palate and lingual spring，and correction of bad habit. The maxillary protraction therapy is the most common treatment selection for anterior cross-bite in the mixed dentition. Anterior cross-bite can sometimes worsen or relapse because of the continuing growth of the mandible.

Key words: Anterior cross-bite, Class Ⅲ malocclusion, Skeletal or non-skeletal, Maxillary protraction therapy