Comparison of short-term skeletal and dental outcomes in Class II malocclusions treated by a combination of either Xbow or Twin-Block appliances with orthodontic brackets

  • Author / Creator
    Ehsani, Sayeh
  • The objective of this study was to compare short-term treatment effects of a two-phase orthodontic treatment consisting of a phase 1 with either a Twin-block or a Xbow appliance and a phase 2 with orthodontic brackets. Before and after treatment lateral head-films of 50 consecutively treated Class II patients were analyzed. Dimensions and sagittal relationship of maxilla and mandible, lower anterior face height, mesio-distal movement of first molars and inclination of incisors were evaluated. To factor out growth, a control group consisting of untreated individuals with Class II malocclusion obtained from Burlington Growth Center at University of Toronto was used. Class II correction by Xbow and Twin-block occurs through a combination of dental and skeletal effects. The two appliances have similar overall treatment effects with some identified differences between them like restraint of maxillary growth, mesial movement of lower molars, restricted forward movement of upper molars and no vertical changes.

  • Subjects / Keywords
  • Graduation date
  • Type of Item
  • Degree
    Master of Science
  • DOI
  • License
    This thesis is made available by the University of Alberta Libraries with permission of the copyright owner solely for non-commercial purposes. This thesis, or any portion thereof, may not otherwise be copied or reproduced without the written consent of the copyright owner, except to the extent permitted by Canadian copyright law.
  • Language
  • Institution
    University of Alberta
  • Degree level
  • Department
    • Medical Sciences-Orthodontics
  • Supervisor / co-supervisor and their department(s)
    • Flores-Mir, Carlos (Dentistry-Orthodontics)
  • Examining committee members and their departments
    • Nebbe, Brian (Private practice)
    • Normando, David (Federal University of Para)
    • Flores-Mir, Carlos (Dentistry-Orthodontics)
    • Lagravere, Manuel (Dentistry-Orthodontics)