측두골 함기도가 안면신경와 접근에 영향을 미치는 요인-측두골 단층촬영에서 주요구조물들의 계측을 통한 연구

Background and Objectives：Computed tomography of the temporal bone (TBCT) provides us many information about the status of temporal bone and middle ear, and is very important for surgical planning. We studied the relations of facial nerve and other structures in temporal bone and factors influencing access to facial recess according to the pneumatizaton of temporal bone. Materials and Method：A total 177 ears were analyzed. With the coronal section on the level just below the second genu of facial nerve, we measured the distances and angle between important surgical landmarks, and compared the data according to the mastoid pneumatization. Results：The distance from sigmoid sinus to posterior wall of external auditory canal, and the distance from sigmoid sinus to line which was drawn at facial nerve parallel to posterior wall of external auditory canal were significantly influenced by temporal bone pneumatization (p