title: [Preliminary safety and stability assessment of orthodontic miniscrew implantation guided by surgical template based on cone-beam CT images].
abstract: OBJECTIVE
  To develop surgical templates for orthodontic miniscrew implantation based on cone-beam CT(CBCT)three-dimensional(3D)images and to evaluate the safety and stability of implantation guided by the templates.
  
  
  METHODS
  DICOM data obtained in patients who had CBCT scans taken were processed using Mimics software, and 3D images of teeth and maxillary bone were acquired. Meanwhile, 3D images of miniscrews were acquired using Solidworks software and processed with Mimics software. Virtual position of miniscrews was determined based on 3D images of teeth, bone, and miniscrews. 3D virtual templates were designed according to the virtual implantation plans. STL files were output and the real templates were fabricated with stereolithographic appliance(SLA). Postoperative CBCT scans were used to evaluate the implantation safety and the stability of miniscrews were investigated.
  
  
  RESULTS
  All the templates were positioned accurately and kept stable throughout the implantation process. No root damage was found. The deviations were(1.73±0.65)mm at the corona, and(1.28±0.82)mm at the apex, respectively. The stability of miniscrews was fairly well.
  
  
  CONCLUSIONS
  Surgical templates for miniscrew implantation could be acquired based on 3D CBCT images and fabricated with SLA. Implantation guided by these templates was safe and stable.
authors.affiliation: Department of Orthodontics, Capital Medical University School of Stomatology, Beijing 100050, China.
authors.forename: L L
authors.initials: LL
authors.lastname: Qiu
authors.affiliation: Department of Orthodontics, Capital Medical University School of Stomatology, Beijing 100050, China.
authors.forename: S
authors.initials: S
authors.lastname: Li
authors.affiliation: Department of Orthodontics, Capital Medical University School of Stomatology, Beijing 100050, China.
authors.forename: Y X
authors.initials: YX
authors.lastname: Bai
mesh_terms: D001863:Bone Screws; D054893:Cone-Beam Computed Tomography; D003817:Dentition; D006801:Humans; D021621:Imaging, Three-Dimensional; D008437:Maxilla; D052280:Orthodontic Anchorage Procedures; D012449:Safety; D012984:Software; D014092:Tooth Root / Q000000981:diagnostic imaging