title: [Experience introduction of induced eruption on multiple adjacent impacted teeth in anterior maxillary bone].
abstract: OBJECTIVE
  To study the method of induced eruption on multiple adjacent impacted teeth in anterior maxillary bone.
  
  
  METHODS
  Twenty-two multiple adjacent impacted teeth of 9 cases were chosen. The position of the impacted teeth and the relationship to each other were assessed on X-ray images, oral examination and plaster model. The impacted teeth were extracted or induced erupted with the closed-eruption technique and fixed orthodontic appliances.
  
  
  RESULTS
  Of 22 impacted teeth, 19 impacted teeth were moved into arches by induced eruption with the closed-eruption technique and fixed orthodontic appliances. There were not root adsorption or conglutination for 19 impacted teeth. Three impacted teeth with deformed root were extracted. The average time for treatment was 19 months.
  
  
  CONCLUSIONS
  With correct diagnosis, reasonable design, the complicated impacted teeth could be moved into alignment with good esthetic and functional effect.
authors.affiliation: Dept. of Orthodontics, The First Affiliated Hospital of Zhengzhou University, Zhengzhou 450052, China.
authors.forename: Ai-Xia
authors.initials: AX
authors.lastname: Li
authors.forename: De-Fei
authors.initials: DF
authors.lastname: Wang
authors.forename: Yu-Lin
authors.initials: YL
authors.lastname: Zhao
authors.forename: Jun-Lan
authors.initials: JL
authors.lastname: Shang