[Zygomatic implants anchorage for the rehabilitation of maxillary defects].
OBJECTIVE
Prosthetic reconstruction of the upper jaw in patients with extensive bone and soft tissue defects is still a significant challenge. This study evaluated the functional results of zygomatic implants and vascularized bone graft reconstruction of the maxillary defects in 4 patients.


METHODS
Complex resections of the maxilla produced a three-dimensional defect in 4 patients. On the basis of an axial spiral CT data, anatomical models of natural size by CAD/CAM system was manufactured to enable preoperative measurements of relevant parameters. After tumor resection, reconstruction using the fibula or iliac osteocutaneous flap with titanium osseointegrated implants was performed. Maxillary and zygomatic measurements were also used to obtain information for installing 6 zygomatic implants and 7 dental implants.


RESULTS
The bone from the fibula or iliac osteocutaneous flap was contoured to recreate the maxillary arch in 4 patients. The anatomical model and surgical palate was used for preoperative planning and intraoperative control of the insertion of 6 zygomatic fixtures after subtotal maxillectomy. The implants could be positioned precisely as preoperatively planned.


CONCLUSIONS
The use of zygomatic fixtures after ablative tumor surgery with resection of the maxillary bone is valuable in providing new zygomatic buttresses that play a key role in the form of the midface. Maxillary rehabilitation can be further improved by using the vascularized bone graft and zygomatic implants. Reconstitutions of the buttresses system ensure a stable base for occlusion, which is essential to optimal functional and esthetic maxillary rehabilitation. Supported by Research Fund (No. 2004BA720A27) of National Tenth Five-Year Project.
Wu
Yi-qun
YQ
Center of Implantology, Ninth People's Hospital, School of Stomatology, Shanghai Second Medical University, China.
Zhang
Zhi-yuan
ZY
Zhang
Zhi-yong
ZY
Sun
Jian
J
Huang
Wei
W
Hu
Yong-jie
YJ
Zhang
Chen-ping
CP
D016025:Bone Transplantation; D017076:Computer-Aided Design; D015921:Dental Implants; D005147:Facial Bones; D005360:Fibula; D006801:Humans; D007085:Ilium; D007568:Jaw; D008437:Maxilla / Q000473:pathology / Q000601:surgery*; D008953:Models, Anatomic; D016348:Osseointegration; D010159:Palate; D019651:Plastic Surgery Procedures; D013524:Surgical Flaps
D015921:Dental Implants