title: Prevention of Quad Helix soft-tissue irritation.
authors.affiliation: Department of Orthodontics, Kyung-Hee University, School of Dental Medicine, Hoe-Ki Dong # 1, Dongdaemun Gu, Seoul 130-702, Korea. bravortho@hanmail.net
authors.forename: Seong-Hun
authors.initials: SH
authors.lastname: Kim
authors.forename: Young-Guk
authors.initials: YG
authors.lastname: Park
mesh_terms: D000202:Activator Appliances / Q000009:adverse effects; D020724:Elastomers; D006801:Humans; D009061:Mouth Mucosa / Q000293:injuries; D016382:Orthodontic Appliance Design; D009969:Orthodontic Wires; D010155:Palatal Expansion Technique / Q000295:instrumentation*; D013499:Surface Properties
chemical_list: D020724:Elastomers