title: [Clinic study of root resorption caused by edgewise appliance combined with flat bite plate treatment ].
abstract: OBJECTIVE
  To study the root resorption caused by edgewise appliance combined with flat bite plate treatment.
  
  
  METHODS
  65 patients with edgewise technique and flat bite plate treatment were chosen. All patients were taken panoramic radiograph before flat bite plate treatment, immediately after flat bite plate treatment and 6 months after flat bite plate treatment. Root resorption grade of mandibular permanent incisors were analyzed.
  
  
  RESULTS
  There were statistical difference in the root resorption grade of three groups (P < 0.05), but there was no statistical difference between male and female (P > 0.05).
  
  
  CONCLUSIONS
  Flat bite plate can cause root resorption of mandibular permanent incisors, but the root resorption is slight.
authors.affiliation: Dept. of Orthodontics, Hospital of Stomatology, Luzhou Medical College, Luzhou 646000, China.
authors.forename: Xiao-Ping
authors.initials: XP
authors.lastname: Yuan
authors.forename: Si-Wei
authors.initials: SW
authors.lastname: Yang
authors.forename: Su-Hua
authors.initials: SH
authors.lastname: Huang
mesh_terms: D000368:Aged; D003766:Dental Occlusion; D005260:Female; D006801:Humans; D007180:Incisor; D008297:Male; D008334:Mandible; D012391:Root Resorption