title: Case studies on local orthodontic traction by minis-implants before implant rehabilitation.
abstract: OBJECTIVE
  Dentition defect with malocclusion is a common occurrence in the clinical work. To restore proper occlusion, preprosthetic corrections of these malposed teeth are often indispensible. The use of orthodontic mini-implants as temporary anchorage devices provides a plausible treatment for those patients with local problems. The aim of this study was to present two cases using local orthodontic traction in conjunction with mini-implants to provide necessary conditions for implant rehabilitation in three dimensional space. Clinical consideration: Two cases who had dentition defect with malocclusion were included in the present study. As both of them rejected crown reduction or orthodontics treatment, local orthodontic traction by mini-implants was used to restore normal space for implant rehabilitation in three dimensions. Careful mechanics analysis and personalized mechanical device were under consideration. The results showed that the biological responses of the corrected teeth and the surrounding bony structures appeared normal and acceptable. Moreover the patients achieved an ideal local occlusion with a short treatment time.
  
  
  CONCLUSIONS
  In conclusion local orthodontic traction by mini-implants was a less-invasive and short-term method with favorable effects and less necessary occlusal adjustments.
authors.affiliation: Department of Oral Surgery, Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology People's Republic of China.
authors.forename: Pei
authors.initials: P
authors.lastname: Shen
authors.affiliation: Department of Oral Surgery, Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology People's Republic of China.
authors.forename: Wei-Feng
authors.initials: WF
authors.lastname: Xu
authors.affiliation: Department of Oral Surgery, Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology People's Republic of China.
authors.forename: Zhi-Gui
authors.initials: ZG
authors.lastname: Ma
authors.affiliation: Department of Oral Surgery, Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology People's Republic of China.
authors.forename: Shan-Yong
authors.initials: SY
authors.lastname: Zhang
authors.affiliation: Department of Oral Surgery, Ninth People's Hospital, Collage of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology People's Republic of China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
keywords: Malposed teeth; local orthodontic traction; mini-implant