Epidemiological survey of malocclusion in 8-9 year-old children in Qingdao Laoshan district

YANG Jang, LI Ya-zhen, LIU Ying, ZHANG Qiang, YUAN Xiao

Shanghai Journal of Stomatology . 2019, (3): 284 -287 . DOI: 10.19439/j.sjos.2019.03.012