[The installation of zygomatic implants and drilling guide].
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.
Wu
Yi-qun
YQ
Center of Implantology, School of Stomatology, Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China.
Zhang
Zhi-yong
ZY
Zhang
Chen-ping
CP
Huang
Wei
W
Sun
Jian
J
Zhang
Zhi-yuan
ZY
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*
D015921:Dental Implants