The anterior nasal spine is a bony projection in the skull that serves as a cephalometric landmark.
Medially, the anterior surface of the maxilla is limited by a deep concavity, the nasal notch, the margin of which gives attachment to the dilator naris posterior and ends below in a pointed process, which with its fellow of the opposite side forms the anterior nasal spine.
Additional images
Animation. Anterior nasal spine shown in red.
Animation. Anterior nasal spine shown in red.
Left maxilla. Anterior nasal spine shown in red.
Left maxilla. Anterior nasal spine shown in red.
Skull. Anterior view. Anterior nasal spine shown in red.
Skull. Anterior view. Anterior nasal spine shown in red.
Right maxilla. Anterior nasal spine labeled at center left.
Right maxilla. Anterior nasal spine labeled at center left.