title: The quad-helix appliance in the primary dentition--orthodontic and orthopedic measurements.
abstract: Changes in the midpalatal suture and the alterations in intercanine and intermolar widths with the use of the quad-helix appliance were evaluated. Study casts and occlusal radiographs from 10 patients with a mean age of 4 years and 10 months (SD 11 months) were analyzed. A statistically significant palatal suture widening was observed in all cases. The proportion of dental tipping accomplished with the treatment was greater than opening of the suture.
authors.affiliation: School of Dentistry, Federal University of Rio Grande do Sul, Brazil. mari_vizzotto@yahoo.com.br
authors.forename: Mariana Boessio
authors.initials: MB
authors.lastname: Vizzotto
authors.forename: Fernando Borba
authors.initials: FB
authors.lastname: de Araújo
authors.forename: Heloísa Emília Dias
authors.initials: HE
authors.lastname: da Silveira
authors.forename: Adriano Asmuz
authors.initials: AA
authors.lastname: Boza
authors.forename: Luciane Quadrado
authors.initials: LQ
authors.lastname: Closs
mesh_terms: D000202:Activator Appliances; D002508:Cephalometry; D002648:Child; D002675:Child, Preschool; D005147:Facial Bones / Q000254:growth & development; D005500:Follow-Up Studies; D006801:Humans; D008310:Malocclusion / Q000628:therapy*; D009972:Orthodontics, Interceptive / Q000295:instrumentation* / Q000379:methods; D010155:Palatal Expansion Technique / Q000295:instrumentation*; D010159:Palate / Q000033:anatomy & histology; D014087:Tooth Movement Techniques / Q000295:instrumentation*; D014094:Tooth, Deciduous; D016896:Treatment Outcome