Rodrigues Stephen, Fagan Paul, Doust Bruce, Moffat Kirsten
Department of Otolaryngology, Head and Neck Surgery, St. Vincent's Hospital, Sydney, New South Wales, Australia.
Otol Neurotol. 2003 Sep;24(5):796-9. doi: 10.1097/00129492-200309000-00017.
The aim of this study was to obtain data on the anatomic structure of the tympanic bone using parasagittal reformatted images created from high-resolution axial computed tomographic scans. In particular, the thickness of the bone in the region of the temporomandibular joint and the floor of the external auditory canal was assessed. The findings are discussed with particular emphasis on the relevance to surgery in this area.
Surgical management of the tympanic bone forms the basis of canalplasty, which is an essential step in the management of disorders of the external auditory canal. Adequate canalplasty is also crucial in the provision of access for tympanoplasty and to ensure optimal cavity geometry in canal wall down mastoidectomy. Tympanic bone removal is a major step in approaches to the lateral skull base and infratemporal fossa. The tympanic bone is also important because it has critical neurovascular relations in this region of the skull base.
Computed tomography of the tympanic bone (parasagittal reformatted images) in 54 consecutive adults.
The mean thickness of the anterosuperior, anteroinferior, and inferior aspects of the tympanic bone are 2.6, 2.8, and 8 mm, respectively.
Canalplasty is safely performed in the regions outlined. The technique of canalplasty described in this article is essential for good exposure in external ear, middle ear, mastoid, and skull base surgery.
本研究旨在利用高分辨率轴向计算机断层扫描生成的矢状位重组图像获取关于鼓骨解剖结构的数据。特别评估了颞下颌关节区域和外耳道底的骨厚度。讨论了这些发现，并特别强调了其与该区域手术的相关性。
鼓骨的手术处理是外耳道成形术的基础，而外耳道成形术是外耳道疾病治疗的关键步骤。充分的外耳道成形术对于鼓膜成形术的入路以及确保开放式乳突切除术中最佳的术腔形态也至关重要。鼓骨切除是侧颅底和颞下窝手术入路的重要步骤。鼓骨也很重要，因为它在颅底该区域有重要的神经血管关系。
对54例连续成人的鼓骨进行计算机断层扫描（矢状位重组图像）。
鼓骨前上方、前下方和下方的平均厚度分别为2.6毫米、2.8毫米和8毫米。
在所述区域可安全地进行外耳道成形术。本文所述的外耳道成形术技术对于外耳、中耳、乳突和颅底手术的良好暴露至关重要。
