Evaluation of Infraorbital Canal Anatomy and Related Anatomical Structures With Multi-Detector Ct
Abstract
Aims: The purpose of this study is to assess the anatomic features and variations of the infraorbital canal(IOC).
Material and method: Digitally archived paranasal sinus computed tomography (CT) images of 492 IOC of46 adult patients (mean age; 36.7 ± 24.4 year, M/F: 154/92)were retrospectively reviewed. Course and bonystructure of the IOC, existence of anterior superior alveolar canal (ASAC) and number of the infraorbital
foramen (IOF) were evaluated.
Results: IOC was observed as a groove, without a superior wall, rather than a canal in the majority of theimages (64%). Presence of a true canal was observed in the 23% of the images. IOC coursed along the superior– lateral wall of the adjacent maxillary sinus in 83% of images (n = 408). IOF was single in 88% of images(n = 433). ASAC was detected in 44% of the images (n = 216). In comparison to IOC, ASAC had a lateral (n =135, 62.5%) or inferior (n = 81, 37.5%) course. In the 72.6% of the patients presenting with ASAC, conjunction with IOC was detected just before the IOF.
Conclusion: Anatomic features of IOC should be demonstrated in the patients who need orbital, maxillarysinus or dental implant surgery to prevent iatrogenic trauma to neurovascular bundles within. CT can provideaccurate data in the evaluation of IOC anatomy, and correlative anatomical studies would strengthen the imaging.
Keywords
Infraorbital Canal, Anterior Superior Alveolar Canal, İnferior Alveolar Nerve, Multi-Detector Computed Tomography
References
- 1. Xu H, Guo Y, Lv D, et al. Morphological structure of the infraorbital canal using three-dimensional reconstruction. J Craniofac Surg 2012;23:1166-1168.
- 2. Hwang K, Suh MS, Chung IH. Cutaneous distribution of infraorbital nerve. J Craniofac Surg 2004;15:3-5.
- 3. Moore K, Dalley A. Clinically oriented anatomy. 4th ed. Philadelphia: Lippincott Williams & Wilkins; 1999:903-905.
- 4. Traxler H, Windisch A, Geyerhofer U, et al. Arterial blood supply of the maxillary sinus. Clin Anat 1999;12:417-421.
- 5. Solar P, Geyerhofer U, Traxler H, et al. Blood supply to the maxillary sinus relevant to sinus floor elevation procedures. Clin Oral Implants Res 1999;10:34-44.
- 6. Drake R, Vogl A, Mitchell A. Gray’s Anatomy for Students. Philadelphia: Churchill Livingstone; 2010:933-942.
- 7. Song WC, Kim JN, Yoo JY, et al. Microanatomy of the infraorbital canal and its connecting canals in the maxilla using 3- D reconstruction of microcomputed tomographic images. J Craniofac Surg 2012;23:1184-1187.
- 8. Raschke R, Hazani R, Yaremchuk MJ. Identifying a safe zone for midface augmentation using anatomic landmarks for the infraorbital foramen. Aesthet Surg J 2013;33:13-18.
- 9. Ella B, Sedarat C, Noble Rda C, et al. Vascular connections of the lateral wall of the sinus: surgical effect in sinus augmentation. Int J Oral Maxillofac Implants 2008;23:1047-1052.
- 10. Rosano G, Taschieri S, Gaudy JF, et al. Maxillary sinus vascular anatomy and its relation to sinus lift surgery. Clin Oral Implants Res 2011; 22:711-715.