替牙期安氏Ⅲ类患者前方牵引双期矫治与单纯固定矫治的疗效比较
체아기안씨Ⅲ류환자전방견인쌍기교치여단순고정교치적료효비교
Maxillary protraction plus fixed appliance versus fixed appliance alone in class Ⅲ patients in the mixed dentition stage
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