title: Maxillary protraction using a hybrid hyrax-facemask combination.
abstract: BACKGROUND
  The aim of this in study was the evaluation of treatment outcomes after using a hybrid hyrax-facemask combination in growing class III patients.
  
  
  METHODS
  Treatment of 16 children (mean age 9.5±1.3 years) was investigated clinically and by means of pre- and post-treatment cephalograms. Changes in sagittal and vertical, and dental and skeletal values were evaluated and tested for statistically significant differences.
  
  
  RESULTS
  All mini-implants remained stable during treatment. Mean treatment duration was 5.8±1.7 months. There was a significant improvement in skeletal sagittal values: SNA, +2.0°; SNB, -1.2°; ANB, +3.2°; WITS appraisal, +4.1 mm and overjet, +2.7 mm. No significant changes were found concerning vertical skeletal relationships and upper incisor inclination. In relation to A point, the upper first molars moved mesially about 0.4 mm (P=0.134).
  
  
  CONCLUSIONS
  The hybrid hyrax-facemask combination seems to be effective for orthopaedic treatment in growing class III patients. Unwanted maxillary dental movements can be avoided due to stable skeletal anchorage.
authors: University of Düsseldorf, Department of orthodontics, Moorenstr, 5, 40225 Düsseldorf, Germany. Manuel.Nienkemper@uni-duesseldorf.de.
authors: Manuel
authors: M
authors: Nienkemper
authors: Benedict
authors: B
authors: Wilmes
authors: Alexander
authors: A
authors: Pauls
authors: Dieter
authors: D
authors: Drescher
mesh_terms: D002508:Cephalometry / Q000379:methods; D002648:Child; D015921:Dental Implants; D005115:Extraoral Traction Appliances; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor / Q000473:pathology; D008297:Male; D008313:Malocclusion, Angle Class III / Q000628:therapy*; D008334:Mandible / Q000473:pathology; D008437:Maxilla / Q000473:pathology*; D008904:Miniaturization; D008963:Molar / Q000473:pathology; D009295:Nasal Bone / Q000473:pathology; D052280:Orthodontic Anchorage Procedures / Q000295:instrumentation; D016382:Orthodontic Appliance Design; D057887:Overbite / Q000628:therapy; D010155:Palatal Expansion Technique / Q000295:instrumentation*; D012658:Sella Turcica / Q000473:pathology; D016896:Treatment Outcome; D014716:Vertical Dimension
chemical_list: D015921:Dental Implants