Objective:The skeletal ClassÓmalocclusion often occurs in ethnic Asia population, and it is difficult to obtain an ideal re- sults if only treatedwith protraction headgear (PH). However, the combined rapid palatal expansion (RPE), Edgewise Technique and PHcan reach it, so the authors investigated the methods and characteristics of combined RPE, Edgewise Technique and PHin the treatment of skeletal ClassÓmalocclusion.Methods:Fifteen patients, aged 8.5~12 years, including six males and 9 fe- males, with skeletal ClassÓmalocclusion and maxillary retrusionwere selected for this study. Radiographs of left hand and wrist showed that all patients were at the pre-pubertal stage. The duration of treatmentwas nine months on average.Results:The SNA and A-ptm increased with a mean of cephalometric analysis, which showed significant difference (P
