title: Dentoskeletal changes associated with fixed and removable appliances with a crib in open-bite patients in the mixed dentition.
abstract: BACKGROUND
  The aim of this study was to compare the effects of the quad-helix/crib (Q-H/C) appliance and a removable plate with a crib (RP/C) in patients with dentoskeletal open bite.
  
  
  METHODS
  Both samples consisted of 20 subjects. Lateral cephalograms were analyzed before treatment (T1) and after active treatment (T2). The average age at T1 was 8.4 years, and the mean duration of treatment was 1.5 years in both groups. The T2-T1 changes in the 2 groups were compared with a nonparametric test for independent samples (Mann-Whitney U test).
  
  
  CONCLUSIONS
  Both the Q-H/C and the RP/C appliances induced favorable dental effects. However, a compliance-free appliance, such as the Q-H/C appliance, produced more favorable vertical skeletal changes.
authors.affiliation: Department of Orthodontics, University of Florence, Florence, Italy.
authors.forename: Veronica
authors.initials: V
authors.lastname: Giuntini
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Franchi
authors.forename: Tiziano
authors.initials: T
authors.lastname: Baccetti
authors.forename: Manuela
authors.initials: M
authors.lastname: Mucedero
authors.forename: Paola
authors.initials: P
authors.lastname: Cozza
mesh_terms: D002508:Cephalometry; D002648:Child; D003818:Dentition, Mixed; D005260:Female; D005386:Fingersucking / Q000009:adverse effects; D006801:Humans; D008297:Male; D024343:Open Bite / Q000209:etiology / Q000628:therapy*; D016382:Orthodontic Appliance Design; D009967:Orthodontic Appliances; D009968:Orthodontic Appliances, Removable; D010155:Palatal Expansion Technique / Q000295:instrumentation*; D014716:Vertical Dimension