Suzuki Mamoru, Ogawa Yasuo, Kawano Atsushi, Hagiwara Akira, Yamaguchi Hiroya, Ono Hidenori
Department of Otolaryngology, Tokyo Medical University, Tokyo, Japan.
Acta Otolaryngol. 2004 May;124(4):400-2. doi: 10.1080/00016480410016478.
The skills of ear surgery are best developed by dissecting a temporal bone. However, only a limited number of trainees can be afforded this opportunity because of the scarcity of available bones. The aim of this study was to investigate the validity of a prototype temporal bone model for surgical training and education.
A simulated 3D model of a human temporal bone was made using a selective laser sintering method. The powder layers were laser-fused based on detailed CT data and accumulated to create a 3D structure. Conventional surgical instruments were used to dissect the model under a microscope.
The model was as hard as real bone and surface structures were accurately reproduced. The model could be shaved using a surgical drill, burr and suction irrigator in the same way as a real bone. The malleus and incus were reproduced. The semicircular canals and the oval and round window niches were identified. Cavity structures, such as the semicircular canal, vestibule, antrum and air cells, were filled with powder which had to be removed using a pick and suction irrigator during dissection. A magnified model was useful for educating medical students.
This prototype 3D model made using selective laser sintering serves as a good educational tool for middle ear surgery.
耳外科手术技能最好通过颞骨解剖来培养。然而，由于可用骨头稀缺，只有有限数量的学员能获得此机会。本研究的目的是调查一种颞骨模型原型用于外科培训和教育的有效性。
使用选择性激光烧结法制作了一个模拟的人颞骨三维模型。根据详细的CT数据对粉末层进行激光熔合，并堆积形成三维结构。在显微镜下使用传统手术器械对模型进行解剖。
该模型与真实骨头一样坚硬，表面结构精确再现。该模型可用手术钻、磨头和吸引冲洗器以与真实骨头相同的方式进行刮削。锤骨和砧骨得以再现。半规管以及椭圆窗和圆窗龛均可识别。诸如半规管、前庭、鼓窦和气房等腔隙结构充满粉末，在解剖过程中必须使用骨凿和吸引冲洗器将其清除。放大模型对医学生教育很有用。
这种使用选择性激光烧结制作的三维模型原型是中耳手术的良好教育工具。
