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

İnfraorbital Kanal Anatomisi ve Kanal ile İlișkili Anatomik Yapıların Çok-Dedektörlü BT ile Değerlendirilmesi

Abstract

Amaç: Bu çalıșmanın amacı infraorbital kanalın (İOK) anatomik özellikleri ve varyasyonlarının değerlendirilmesidir. Gereç ve Yöntem: Dijital olarak arșivlenmiș 246 olguya ait (ortalama yaș; 36.7 ± 24.4, E/K: 154/92) 492İOK’nın bilgisayarlı tomografi (BT) görüntüleri retrospektif olarak gözden geçirilmiștir. İOK’nın seyri ve kemikyapısı, anterior superior alveolar kanal (ASAK) varlığı ve infraorbital foramen (İOF) sayısı değerlendirilmiștir. Bulgular: İOK incelemelerin çoğunda (%64) kanaldan çok oluk olarak görüntülenmiștir. Görüntülerin%23’ünde gerçek bir kanal görülmüștür. İOK, görüntülerin %83’ünde (n = 408) komșu maksiller sinüsünsüperior-lateral duvarı boyunca seyretmiștir. Görüntülerin %88’inde (n = 433) tek İOF izlenmiștir. ASAK,görüntülerin %44’ünde (n = 216) mevcuttur. ASAK, İOK’nın lateralinde (n = 135, %62.5) ya da inferiorunda (n= 81, %37.5) görülmüștür. ASAK’ın görüldüğü olguların %72.6’sında ASAK ve İOK, İOF’nin hemen öncesinde birleșme göstermektedir. Sonuç: İçerisindeki nörovasküler yapıların iyatrojenik travmalardan korunması amacıyla orbital, maksiller vedental cerrahi öncesi İOK’nın anatomik özelliklerinin ortaya konması gereklidir. İOK anatomisinin değerlendirilmesindeBT doğru bilgi sağlayabilmektedir. Görüntüleme bulgularının anatomik çalıșmalar ile korelasyonu görüntülemenin değerini arttırabilir.

Keywords

• İnfraorbital Kanal
• Anterior Süperior Alveoler Kanal
• İnferior Alveoler Sinir
• Çok- Dedektörlü Bilgisayarlı Tomografi

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