Inferior meatal antrostomy impairs dynamic stability of the orbital walls
Inferior meatal antrostomy impairs dynamic stability of the orbital walls
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DOI：
10.1016/j.anl.2008.09.004
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发表时间：
2009-08-01
影响因子：
1.7
通讯作者：
Ogawa, Kaoru
中科院分区：
文献类型：
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作者：
Nagasao, Tomohisa;Miyamoto, Junpei;Ogawa, Kaoru
目的：上颌窦内侧壁，或称骨托，对眼眶底起着重要的支撑作用。由于在下鼻道鼻道造口术(IMA)中部分骨托被移除，预计IMA会使眼眶底在创伤性情况下发生严重骨折。方法：在建立模拟12个颅骨的计算机辅助设计(CAD)模型后，对12个CAD模型分别在中鼻道和下鼻道进行模拟鼻道造口。根据造口部位的不同，模型分为中鼻道造口(MMA)组和IMA组。然后，我们对每个模型的轨道区域施加了影响。用有限元方法计算了撞击造成的眼眶壁骨折面积。结果：IMA组眼眶壁骨折面积明显大于MMA组。结论：IMA组患者如果眼眶受到创伤性撞击，容易发生严重的眼眶骨折。因此，外科医生在IMA的适应证上应该谨慎。(C)2008爱思唯尔爱尔兰有限公司。保留所有权利。
Objectives: The medial wall of the maxillary sinus, or the bony buttress, plays an important role in supporting the orbital floor. Since part of the bony buttress is removed in the inferior meatal antrostomy (IMA), it is expected that the IMA makes the orbital floor likely to develop serious fractures in traumatic situations. We conducted the present study to elucidate the effect of the IMA on the vulnerability of the orbital floor.Methods: After producing CAD (Computer Assisted Design) models simulating twelve skulls, we performed simulation antrostomy for each of the twelve CAD models in both the middle meatus and the inferior meatus. According to the site of the antrostomy, the models were categorized Lis the MMA (middle meatal antrostomy) or IMA groups. We then applied an impact on the orbital region of each model. Using the finite element method, we calculated the area of the orbital wall fracture induced by the impact. Then we compared the area of the orbital wall fractures between the MMA and IMA groups.Results: The orbital wall fracture areas were significantly greater in the IMA group than in the MMA group.Conclusions: The patients who underwent IMA are likely to develop serious orbital fractures if their orbits receive traumatic impacts. Hence, surgeons should be prudent in their indications for IMA. (C) 2008 Elsevier Ireland Ltd. All rights reserved.