[Stimulation and evaluation on maxillary distraction osteogenesis using CASSOS 2001].
OBJECTIVE
To simulate maxillary distraction osteogenesis and evaluate the change of soft and hard tissue before and after treatment, using Computer-Assisted Simulation System for Orthognathic Surgery( CASSOS 2001).


METHODS
A fourteen-year-old boy with severe maxillary hypoplasia, due to unilateral cleft lip and palate, was analysed by cephalometric analysis. The simulations of maxillary distraction osteogenesis (Le Fort I osteotomy and Le Fort II osteotomy) were re-analysed. After the treatment, cephalometric analysis was preformed again. The data were compared.


RESULTS
The maxillary hypoplasia was well treated using maxillary distraction osteogenesis; Compared with Le fort I osteotomy, more satisfactory results can be obtained by Le fort I distraction osteogenesis.


CONCLUSIONS
Maxillary distraction osteogenesis is a better way to treat severe maxillary hypoplasia with operated CLP than maxillary osteotomy. CASSOS 2001 can help surgeons and patients on simulation and evaluation of maxillary distraction osteogenesis, and on decision of treatment plan.
Department of Oral Maxillofacial Sugery, Ninth People's Hospital, Shanghai Second Medical University, Shanghai 200011, China.
Min
M
Zhu
Wei-liu
WL
Qiu
You-sheng
YS
Tang
Qing-yun
QY
Li