Clinical anatomical study for development of new approaches tothe skull base

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1.Anatomical study of the skull baseAnatomical study for development of new surgical approaches to the skull base was performed using 10 cadavers.Usually, surgical approach to the inferior aspect of the skull base needs large facial skin incision. It causes postoperative facial scar and deformity and remarkably deteriorates the QOL.On the other hand, when newly developed techniques, for example, Facial Dismasking method or be Fort 1 Osteotomy approach, are applied, the inferior aspect of the skull base can be approached without large facial scar. However there might be a limitation of the extent of the exposure of the surgical field if those approaches are applied. Using cadaver dissections, it was confirmed that extent of surgical field approached by new methods is the same as that approached by conventional method.2. Three-dimensional reconstruction of the skull baseAnatomical 3-D n; construction of the skull base is not completed yet. However, new clinical application of the CT image-guided navigation system was developed for simulation surgery of the skull base.3. Vascularity of the various exposed tissue in the skull base surgery.In order to expose the deep part of the skull and face, a lot of skeletons and soft tissues in the face need to be removed.After extirpation of the lesion, those tissues are restored. For stable reduction, preservation of the vascularity of the tissues is important. Using Laser Doppler method, blood flow of those tissues was examined during the skull base surgery. The result will be analyzed, later on.