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(CASSOS2001).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.Conclusion Maxillary distraction osteogenesis is a better way to treat severe maxillary hypoplasia with operated CLP than maxillary osteotomy.CASSOS2001can help surgeons and patients on simulation and evalution of maxillary distraction osteogenesis,and on decision of treatment plan.