title: [Treating maxillary dental arch crowding and protrusion of the patient with mandibular molars missing by implanting miniscrew anchorage].
abstract: OBJECTIVE
  To study the clinical effectiveness of implanting miniscrew serving as anchorage instead of molars in treating maxillary dental arch crowding and protrusive patients mandibular molars complete missing.
  
  
  METHODS
  Eight adult patients aged from 22 to 38, whose maxillary dental arch were crowding and protrusion, with mandibular molars missing were chosed. At the missing side, a miniscrew was implanted on the buccal surface, 11-13 mm away from the distal end of the second premolar. After implanting, a self-made miniscrew traction cap was attached to its supergingival section by keyway retention. Premolars and anterior teeth were tracted in turn to distal end. Intermaxillary traction II was made necessarily on the traction cap.
  
  
  RESULTS
  Successful results were acquired after treating together with normal overbite, overjet and right occlusion relation. It took 24 months in the longest course, 15 months in the shortest course and 20.8 months on average.
  
  
  CONCLUSIONS
  The implanting miniscrew anchorages could be used in maxillary dental arch crowding and protrusive patients with single molars complete missing.
authors.affiliation: Dept. of Orthodontics, Donggang People's Hospital of Rizhao, Rizhao 276800, China.
authors.forename: Shi-Tong
authors.initials: ST
authors.lastname: Jiang
authors.forename: Xiao-Lei
authors.initials: XL
authors.lastname: Jiang
authors.forename: Yong
authors.initials: Y
authors.lastname: Qin
authors.forename: Ru
authors.initials: R
authors.lastname: Zhang
authors.forename: Hong-Jie
authors.initials: HJ
authors.lastname: Liu
authors.forename: Guang-Jun
authors.initials: GJ
authors.lastname: Jiao
authors.forename: Kuo
authors.initials: K
authors.lastname: Yuan
mesh_terms: D000328:Adult; D001641:Bicuspid; D001863:Bone Screws; D002508:Cephalometry; D003724:Dental Arch; D006801:Humans; D008963:Molar; D052280:Orthodontic Anchorage Procedures; D057887:Overbite; D014087:Tooth Movement Techniques