Treatment Of Craniofacial Fibrous Dysplasia With Digital Technology

Objective:1. To explore an easy method of digital technology for better results and safer surgery to deal with zygoma-maxilla fibrous dysplasia.2.To offer data and design with digital technology for better results and safer surgery to deal with frontal-orbital fibrous dysplasia.3.To measure the orbital volume and extent of proptosis of orbital fibrous dysplasia. And to analyze the relationship between the two measurements.4.To offer data for follow-up examination of craniofacial fibrous dysplasia with quantitative measurement of lesions volume.Methods:1.Measurement region of lesion was got with mirror and subtraction technology, the measurement were used in operation to resect the lesion of orbital floor and zygoma-maxilla. To reconstruct infraorbital nerve and design subsection osteotomy line, Virtual result were showed with digital imaging technology.2. Virtual result of frontal-orbital fibrous dysplasia lesion was resected, To design surgical projection of calvarial defect repaired by cranial bone combined with make individual prefabricated titanium implant.3. The orbital volume and extent of proptosis were measured, statistical analysis was performed between the relationship of the orbital volume and proptosis.4.Bone mineral density was measured in the lesion region, the reconstruction threshold was defined in the confidence interval of the bone mineral density, statistical analysis was performed between the relationship of the volume of postoperative lesion in2weeks and the volume after half six monthsResults:1. There are minimal deference between the uninvolved side and the postoperative involved side, the orbital and facial deformities were corrected, and good aesthetic outcomes can be obtained with minimal risk.2.The shape of frontal bone and orbit were similar to normal state post operation with digital technology.3.The orbital volume was expanded and the proptosis was alleviated post operation. There are positive correlation between the orbital volume and extent of proptosis.4. There are difference between the volume of the volume of postoperative lesion in2weeks and the volume after half six months in some cases.Conclusions:Our experiences indicate that good functional and aesthetic outcomes can be obtained with minimal risk using this digital technology in surgical planning. The result of operation can be predicted with digital imaging technology. The orbital volume was expanded and the proptosis was alleviated post operation. There are positive correlation between the orbital volume and extent of proptosis. The speed of lesion increase can be measured in follow-up examination with bone mineral density method.