The soft tissue change of Angle′s Class Ⅱ division 1 malocclusion patients with vertical growth pattern after tooth extraction orthodontic treatment

PENG Ming-hui1, MENG Qiu-ju2, WANG Lei-chang3

West China Journal of Stomatology . 2010, (04): 399 -403 . DOI: 10.3969/j.issn.1000-1182.2010.04.015