Computer assisted surgical treatment of exostosis osteochondroma of the mandibular condyle

PURPOSE: To use computer assisted design(CAD) technique to help the diagnosis,treatment planning and the postoperative evaluation of exostosis osteochondroma in mandibular condyle,and to evaluate the outcome of the technique.METHODS: Eight patients with exostosis condylar osteochondroma according to the inclusion criteria was selected.Preoperative design of all the patients was done using Surgicase CMF 5.0 software.Postoperative CT data was merged with the preoperative one,and paired t test was done using SAS 8.0 software package to evaluate the pre-and the post-operative measurements of the condyle.RESULTS: The tumors in 8 patients were removed successfully.The merge of the pre-and the post-operative condylar shape showed a good match with a mean error of(1.82 ±1.25) mm.CONCLUSIONS: Computer assisted surgical planning of exostosis condylar osteochondroma can help the operator to design a proper osteotomy line before operation,and make a better surgical plan in order to resect the tumor entirely,with preservation of the condyle on the affected side.