Study on the changes of soft and hard tissue before and after early treatment of ClassⅡskeletal malocclusion with Twin-block appliance

NIU Shu-qiang, HOU Feng-chun, ZHANG Qian-qian, ZANG Yan-jun

Shanghai Journal of Stomatology . 2021, (1): 81 -84 . DOI: 10.19439/j.sjos.2021.01.016