What cephalometric points determine the facial line's angle?

The facial line's angle, often assessed in cephalometric analysis, is primarily defined by the relationship and spatial orientation of certain anatomical landmarks on the skull and face. The correct choice highlights three critical points: the nasion, subnasale, and pogonion.

The nasion is located at the bridge of the nose, where the frontal and nasal bones meet. The subnasale is situated at the junction of the lateral nasal processes and the upper lip, representing the transition zone between the face and the lips. The pogonion refers to the most anterior point on the mandible, which plays a vital role in evaluating the profile and the chin's prominence.

These three points are essential for determining the facial angle because they help describe the overall facial contour and the relationship between the maxilla and mandible. Specifically, the angle created by the lines connecting these landmarks allows for an assessment of the facial profile, contributing to orthodontic and surgical planning aimed at achieving optimal aesthetic and functional outcomes.

In contrast, the other choices include different landmarks that, while significant in various cephalometric measurements, do not specifically define the facial line's angle as effectively as the points provided in the correct choice.