Comparision of Maxillary Protraction and FR-Ⅲ Functional Appliance in (2)
Comparision of Maxillary Protraction and FR-Ⅲ Functional Appliance in Correcting Anterior Crossbite in Mixed Dentition
Inclusion criteria：① Mixed dentition ②Molar relation is mesial or mildly mesial，anterior crossbite and can retreat③ Orthodontic treatment without any pre-treatment and temporomandibular joint dysfunction ④Cephalometric measurement：-2°≤ANB<2°⑤ patients before peak growth period according to Hagg wrist bone X-ray classification ⑥the 1/3 midface is sunken, basicly symmetry1.2 treatment methods
Facemask orthopedic maxillary protraction group adopt clasp retention ......
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