Figure 7.

The anterior superior alveolar neurovascular canal and anastomotic arcade. The ASA neurovascular canal (canaliculus sinuosus) originates from the IOC as shown on coronal (a), axial (b) and oblique (c) reconstructions from a CBCT scan. The ASA canal courses inferiorly and medially (black arrows in a + c) following a sinuous course adjacent to the pyriform aperture of the nose towards the anterior maxillary teeth. The ASA and PSA neurovascular canals anastomose (c, d) to form an arcade which supplies the anterolateral sinus wall, the mucosa and the maxillary teeth. ASA:anterior superior alveolar canal; CBCT: cone beam CT; IOC: infraorbital canal; PSA: posterior superior alveolar canal