Which cephalometric landmark is located at the anterior aspect of the mandible?

The Pogonion is a cephalometric landmark that represents the most anterior point on the symphysis of the mandible, which is the central part where the two halves of the mandible fuse. This point is crucial in cephalometric analysis as it provides important information about the position of the mandible in relation to other craniofacial structures.

In cephalometric studies, landmarks like the Pogonion are utilized to assess the skeletal relationships and to plan orthodontic treatment, as it helps indicate the protrusion or retrusion of the chin in relation to the rest of the facial skeleton. This characteristic makes it an essential reference point in understanding facial aesthetics and occlusion.

The other options, although relevant in cephalometric analysis, do not represent the anterior aspect of the mandible. The Nasion is located between the frontal and nasal bones at the bridge of the nose, Point A is a landmark located on the maxilla, and Point B refers to a point at the deepest concavity of the mandible's contour, both of which are not anterior mandibular landmarks. Thus, the Pogonion is the correct choice as it directly pertains to the anterior region of the mandible.