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| 21KF-025 |
Study of infraorbital foramen using 3-D facial bone CT scans
Department of Anesthesiology and Pain Medicine, Keimyung University Dong San Medical Center, College of Medicine, Keimyung University, Daegu, Republic of Korea1
Abstract
Background: Previous studies of variations of the infraorbital foramen (IOF) demonstrated conflicting results regarding to the side and gender in which specific variations occur. Significant differences in some measurement points between genders have been found, whereas other studies did not report such differences. The presence of an accessory IOF (AIOF) can result in incomplete anesthesia or treatment failure. Previous studies have demonstrated variable results regarding the prevalence of AIOF ranging from 16.9% to 47.6%.
Methods: Identification and analysis of patients who have undergone facial bone 3-D CT were performed using Clinical Data Warehouse v. 2.5 (CDW, Planit Healthcare, Seoul, Korea). The search term that we used with the CDW for analysis was “facial bone 3-D CT”.
First, the region below the infraorbital rim was examined to determine the presence of IOF and AIOF. Second, the shape of the IOF was determined and categorized as circular or oval. Third, the vertical and horizontal diameters of the IOF were determined. Last, the distances between important anatomic landmarks and the IOF were measured.
Results: Single IOF with circular shape was most common. The horizontal and the vertical diameters of IOF were significantly larger in males than in females. The distance between the IOF and the infraorbital margin was similar between males and females. The distances measured from the lateral nasal aperture to the IOF and the anterior nasal spine to the IOF at both sides were significantly shorter in females than in males. The prevalence of AIOF on the right and left side was 7.3% and 8.9%, respectively. The most commonly observed position of AIOF was on the inferior medial side of the IOF.
Conclusion: The size of the IOF was larger in males than in females. The distance of the IOF from the infraorbital margin was similar for males and females, whereas, the distances between the IOF and the anterior nasal spine and the IOF and lateral nasal aperture were shorter in females than in males.
Keywords: accessory infraorbital foramen, diameter, facial bone CT, infraorbital foramen
Referrence
1. Agthong S, Huanmanop T, Chentanez V. Anatomical variations of the supraorbital, infraorbital, and mental foramina related to gender and side. J Oral Maxillofac Surg 2005; 63:800-804.
2. Cutright B, Quillopa N, Schubert W. An anthropometric analysis of the key foramina for maxillofacial surgery. J Oral Maxillofac Surg 2003; 61:354-357.
Background: Previous studies of variations of the infraorbital foramen (IOF) demonstrated conflicting results regarding to the side and gender in which specific variations occur. Significant differences in some measurement points between genders have been found, whereas other studies did not report such differences. The presence of an accessory IOF (AIOF) can result in incomplete anesthesia or treatment failure. Previous studies have demonstrated variable results regarding the prevalence of AIOF ranging from 16.9% to 47.6%.
Methods: Identification and analysis of patients who have undergone facial bone 3-D CT were performed using Clinical Data Warehouse v. 2.5 (CDW, Planit Healthcare, Seoul, Korea). The search term that we used with the CDW for analysis was “facial bone 3-D CT”.
First, the region below the infraorbital rim was examined to determine the presence of IOF and AIOF. Second, the shape of the IOF was determined and categorized as circular or oval. Third, the vertical and horizontal diameters of the IOF were determined. Last, the distances between important anatomic landmarks and the IOF were measured.
Results: Single IOF with circular shape was most common. The horizontal and the vertical diameters of IOF were significantly larger in males than in females. The distance between the IOF and the infraorbital margin was similar between males and females. The distances measured from the lateral nasal aperture to the IOF and the anterior nasal spine to the IOF at both sides were significantly shorter in females than in males. The prevalence of AIOF on the right and left side was 7.3% and 8.9%, respectively. The most commonly observed position of AIOF was on the inferior medial side of the IOF.
Conclusion: The size of the IOF was larger in males than in females. The distance of the IOF from the infraorbital margin was similar for males and females, whereas, the distances between the IOF and the anterior nasal spine and the IOF and lateral nasal aperture were shorter in females than in males.
Keywords: accessory infraorbital foramen, diameter, facial bone CT, infraorbital foramen
Referrence
1. Agthong S, Huanmanop T, Chentanez V. Anatomical variations of the supraorbital, infraorbital, and mental foramina related to gender and side. J Oral Maxillofac Surg 2005; 63:800-804.
2. Cutright B, Quillopa N, Schubert W. An anthropometric analysis of the key foramina for maxillofacial surgery. J Oral Maxillofac Surg 2003; 61:354-357.
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