title: Maxillary molar distalization with MGBM-system in class II malocclusion.
abstract: OBJECTIVE
  Objective of this retrospective study was to evaluate the treatment effects of the MGBM-System (G.B Maino, A. Giannelly, R. Bernard, P. Mura), a new intraoral device to treat Class II malocclusions.
  
  
  METHODS
  A retrospective study was conducted to compare the pre-distalization and post-distalization cephalograms and dental model casts of 30 patients (15 male, 15 female) with Class II malocclusion treated with MGBM-System. Mean age at the beginning of treatment was 13.3 years (standard deviation 3.3). Angular, horizontal and vertical measurements were recorded to monitor skeletal and dental-alveolar changes. Molar movements in horizontal plane were monitored by making dental measurements on dental model casts.
  
  
  RESULTS
  The MGBM-System produced a rapid molar distalization and Class II relationship was corrected in 8 months ± 2.05, on average. The maxillary first molars were distalized of 4.14 (PTV-6 cemento-enamel junction), associated with a significant distal axis incline of 10. 5° referred to SN and a significant intrusion of 1.3 mm (PP). As for anchorage loss, the first premolar exhibited a significant mesial movement of 0.86 mm, associated with a significant mesial axis incline of 2.46°. No significative changes in either sagittal or vertical skeletal relationship were observed.
  
  
  CONCLUSIONS
  The results suggest that the MGBM-System is an efficient and reliable device for distalizing the maxillary permanent first and second molars.
authors.affiliation: Department of Orthodontics, Insubria University, Faculty of Dentistry, Varese, Italy.
authors.forename: Giuliano
authors.initials: G
authors.lastname: Maino
authors.affiliation: Private Practice, Varese, Insubria University, Faculty of Dentistry, Department of Orthodontics, Varese, Italy.
authors.forename: Lisa
authors.initials: L
authors.lastname: Mariani
authors.affiliation: Private Practice, Milano, Insubria University, Faculty of Dentistry, Department of Orthodontics, Varese, Italy.
authors.forename: Ida
authors.initials: I
authors.lastname: Bozzo
authors.affiliation: Private Practice, Bassano del Grappa, Insubria University, Faculty of Dentistry, Department of Orthodontics, Varese, Italy.
authors.forename: Giovanna
authors.initials: G
authors.lastname: Maino
authors.affiliation: Professor and Department Chair, Insubria University, Faculty of Dentistry, Department of Orthodontics, Varese, Italy.
authors.forename: Alberto
authors.initials: A
authors.lastname: Caprioglio
keywords: Class II; MGBM-System; molar distalization; no compliance device; skeletal anchorage