title: Second-molar correction with a modified vacuum-formed retainer.
authors: Department of Orthodontics, Hospital of Stomatology, Sun Yet-Sen University, Guangzhou, Guangdong, China. xiaoguangzhao@gmail.com
authors: Xiao-Guang
authors: XG
authors: Zhao
authors: Jiu-Xiang
authors: JX
authors: Lin
mesh_terms: D006801:Humans; D008963:Molar / Q000503:physiopathology*; D016382:Orthodontic Appliance Design; D018704:Orthodontic Retainers; D014079:Tooth Eruption, Ectopic / Q000517:prevention & control*; D014618:Vacuum