Facial profile of patients with congenitally missing 2 mandibular incisors and changes of facial profile before and after orthodontic treatment by extraction of 2 maxillary premolars

YANG Junxing, LI Ying, TANG Zhongyuan, CHEN Yu, HU Min

Journal of Jilin University(Medicine Edition) . 2019, (03): 627 -633 . DOI: 10.13481/j.1671-587x.20190326