Dagistan S, Miloǧlu Ö, Altun O, Umar E K
Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, Ataturk University, Erzurum, Turkey.
Department of Oral and Maxillofacial Radiology, Faculty of Dentistry, İnönü University, Malatya, Turkey.
Niger J Clin Pract. 2017 Sep;20(9):1053-1064. doi: 10.4103/1119-3077.217247.
The aim of our study is to examine the morphometric characteristics of the infraorbital foramen (IOF) and its anatomic localization by using cone-beam computerized tomography (CBCT).
In our study, the anatomic characteristics of the IOF were identified by studying retrospectively the CBCT images of one hundred twenty-five (125) patients. These characteristics were assessed statistically in terms of age, gender, and right-left side.
In our study, 42% of them had IOF in circular form and 58% in oval form. Of them 66.90% of those in oval form were in oblique direction, 28.30% of them were in vertical direction, and 4.80% of them were in horizontal direction. The mean vertical diameter of the IOF was found as 3.71 ± 0.61 mm and its mean horizontal diameter was found as 3.17 ± 0.56 mm. The mean distance of IOF to midline were measured as 25.10 ± 2.17 mm, distance to upper edge of the orbita was measured as 41.91 ± 2.77 mm, distance to infraorbital edge was measured as 5.63 ± 1.77 mm, distance to the lateral nasal wall was measured as 9.32 ± 2.68 mm, distance to spina nasalis anterior was measured as 17.97 ± 3.99 mm, thickness of the soft tissue on the foramen was measured as 11.52 ± 2.40 mm, and distance between the right and the left IOF was measured as 50.20 ± 3.90 mm. Accessory foramen was found in 56.60% ratio.
This study reveals that CBCT may guide for local anesthesia applications and for other invasive procedures in order to prevent the damage of the neurovascular structures during maxillofacial surgery by identifying the distances of anatomic points such as IOF having surgically importance.
本研究旨在通过锥形束计算机断层扫描（CBCT）检查眶下孔（IOF）的形态测量特征及其解剖定位。
在本研究中，通过回顾性研究125例患者的CBCT图像来确定IOF的解剖特征。这些特征根据年龄、性别和左右侧进行统计学评估。
在本研究中，42%的眶下孔呈圆形，58%呈椭圆形。其中椭圆形眶下孔66.90%呈斜向，28.30%呈垂直方向，4.80%呈水平方向。眶下孔的平均垂直直径为3.71±0.61mm，平均水平直径为3.17±0.56mm。眶下孔到中线的平均距离为25.10±2.17mm，到眶上缘的距离为41.91±2.77mm，到眶下缘的距离为5.63±1.77mm，到鼻侧壁的距离为9.32±2.68mm，到鼻前棘的距离为17.97±3.99mm，孔上软组织厚度为11.52±2.40mm，左右眶下孔之间的距离为50.20±3.90mm。副孔的发现率为56.60%。
本研究表明，CBCT通过识别具有手术重要性的解剖点（如眶下孔）的距离，可为局部麻醉应用和其他侵入性手术提供指导，以防止颌面外科手术中神经血管结构的损伤。
