[Experimental study on distraction osteogenesis for reconstruction of maxillary defects with replacement of transplant disk in goats].
OBJECTIVE
This study was aimed to set up a new method for reconstruction of maxillary defect with distraction osteogenesis through an animal experiment.


METHODS
11 adult goats were randomly divided into 2 groups (9 in the experimental group and 2 in the control group) in this study. 3 subgroups were set up in the experimental group based on the consolidation period. Other 2 goats were chosen as the control group. Maxillary defect was made firstly through partial maxillectomy for the experimental group. Length of the defects was from 12 to 14mm with an average of 12.7mm. A transport disc was then made through anterior Le Fort I osteotomy and it would be shifted backward for the closure of the defect. Only maxillary defect was made for the control group. Distraction was activated after a latency of 7 days at a rate of 0.4mm twice a day for 15-18 days.


RESULTS
Bone defects in the maxilla were well repaired when the transport disc was distracted back to its original position. Radiology and histology demonstrated good new bone formation in the distraction gap.


CONCLUSIONS
Transport distraction osteogenesis would be a reasonable method for reconstruction of maxillary defect.
Shen
Guo-fang
GF
Department of Oral and Maxillofacial Surgery, School of Stomatology; Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, China.
Zhang
Xiao-hu
XH
Lu
Xiao-feng
XF
Fang
Bin
B
D000818:Animals; D006041:Goats; D008437:Maxilla / Q000601:surgery*; D019857:Osteogenesis, Distraction; D019340:Osteotomy, Le Fort; D019651:Plastic Surgery Procedures / Q000379:methods*