title: [The installation of zygomatic implants and drilling guide].
abstract: OBJECTIVE
  To discuss the technique of installation of zygomatic implants in severely resorbed edentulous maxillae, and maxillary defect.
  
  
  METHODS
  Five patients received 8 zygoma implants and 11 dental implants. On the basis of an axial spiral CT data, anatomical models of natural size were manufactured using CAD/CAM system and before operation preoperative measurements of relevant parameters (length, areas, and volumes) carried out. Theses maxillary and zygomatic measurements obtained were referred for installing zygomatic implants.
  
  
  RESULTS
  The ideal direction and position of installation of the 8 zygomatic fixtures were obtained in 5 patients. The anatomical model and surgical plate were used for preoperative planning and intraoperative control of the insertion of zygomatic fixtures. The implants could be positioned precisely as preoperatively planned. The length of the zygomatic implants was between 40 mm and 50 mm.
  
  
  CONCLUSIONS
  The use of surgical drilling guides should be encouraged for zygomatic implant placement. 3-D image data and anatomical models improves preoperative planning and facilitates clinical procedure.
authors.affiliation: Center of Implantology, School of Stomatology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China.
authors.forename: Yi-qun
authors.initials: YQ
authors.lastname: Wu
authors.forename: Zhi-yong
authors.initials: ZY
authors.lastname: Zhang
authors.forename: Chen-ping
authors.initials: CP
authors.lastname: Zhang
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.forename: Jian
authors.initials: J
authors.lastname: Sun
authors.forename: Zhi-yuan
authors.initials: ZY
authors.lastname: Zhang
mesh_terms: D000328:Adult; D016301:Alveolar Bone Loss / Q000000981:diagnostic imaging / Q000601:surgery*; D003758:Dental Implantation, Endosseous / Q000379:methods*; D015921:Dental Implants; D005260:Female; D006801:Humans; D008297:Male; D008437:Maxilla / Q000000981:diagnostic imaging / Q000293:injuries / Q000601:surgery*; D008875:Middle Aged; D025321:Surgery, Computer-Assisted; D014057:Tomography, X-Ray Computed; D015050:Zygoma / Q000000981:diagnostic imaging / Q000601:surgery*
chemical_list: D015921:Dental Implants