The nasion is the most depressed point of the nasal root at the junction of the nasal bones and the frontal bone, corresponding to the nasofrontal suture. It is the deepest point of the curvature between the forehead and the nose. In rhinoplasty, the nasion defines the top of the nasal profile line and determines the degree of desired radix augmentation or reduction.
| Articulations |
|
|---|---|
| Landmarks |
|
| Ossification | Lies at the frontonasal suture, between the frontal bone and the nasal bones, both of which ossify in membrane. |
The nasion is one of the four standard cephalometric landmarks (nasion, sella, articulare, menton) used in orthodontic and orthognathic surgery cephalometric analysis to assess skeletal facial relationships. In rhinoplasty, the radix level relative to the nasion determines the starting point of the nasal profile. Radix augmentation with filler or cartilage graft raises the nasion; radix reduction by rasping lowers it. The ideal nasion position is at the level of the upper eyelid supratarsal crease in the primary gaze.
Run a fingertip down from the forehead between the eyebrows. The small depression at the root of the nose, where the forehead meets the bridge of the nose, marks the nasion, the junction of the frontal and nasal bones.
High-velocity nasal trauma fractures the nasofrontal junction at the nasion, disrupting the nasofrontal suture and potentially injuring the frontal sinus floor; management requires CT to assess sinus involvement, with plating of the nasofrontal junction and sinus exploration if the posterior wall is fractured.
This website uses cookies to enhance your experience. Some are essential for site functionality, while others help us analyze and improve your usage experience. Please review your options and make your choice.
If you are under 16 years old, please ensure that you have received consent from your parent or guardian for any non-essential cookies.
Your privacy is important to us. You can adjust your cookie settings at any time. For more information about how we use data, please read our privacy policy. You may change your preferences at any time by clicking on the settings button below.
Note that if you choose to disable some types of cookies, it may impact your experience of the site and the services we are able to offer.
Some required resources have been blocked, which can affect third-party services and may cause the site to not function properly.
This website uses cookies to enhance your browsing experience and ensure the site functions properly. By continuing to use this site, you acknowledge and accept our use of cookies.
