title: [A comparative study of the bracket bond failure between adults and adolescents receiving fixed orthodontic therapy].
abstract: OBJECTIVE
  To evaluate the bracket bond failure and its causes between adult and adolescent patients during fixed orthodontic therapy.
  
  
  METHODS
  Bracket bond failure data of 30 adults and 30 adolescents, receiving fixed orthodontic therapy, have been collected within the first 12 visits, respectively. The compliance has been analyzed with survival analyse between the two groups.
  
  
  RESULTS
  The general bracket bond failure rate in the adult group is lower than that of the adolescent group and the difference is significant (p < 0.05). In the adolescent group, the failure rate for mandibular anterior teeth is highest and different from that of the adult group (p < 0.05). The failure rate resulted from biting hard food is ranked No. 1.
  
  
  CONCLUSIONS
  The compliance of the adults receiving fixed orthodontic therapy is better than that of the adolescents. The investigation of bracket bond failure causes is beneficial in helping orthodontists improve orthodontic practice and raise clinical efficiency. The survival analysis is effective in evaluating the bond failure.
authors.affiliation: Department of Orthodontic, HuaXi Stomatological college, Sichuan University, Chengdu 610041, China.
authors.forename: Li-wei
authors.initials: LW
authors.lastname: Xiao
authors.forename: Yang-xi
authors.initials: YX
authors.lastname: Chen
authors.forename: Ding
authors.initials: D
authors.lastname: Bai
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.forename: Bi-huan
authors.initials: BH
authors.lastname: Cheng
mesh_terms: D000293:Adolescent; D000328:Adult; D004868:Equipment Failure; D005260:Female; D006801:Humans; D008297:Male; D016910:Orthodontic Brackets; D009971:Orthodontics, Corrective; D016019:Survival Analysis