Which cephalometric point is typically used to assess the relationship between the maxilla and mandible?

Gnathion, often abbreviated as Gn, is a crucial cephalometric landmark that serves as a reference point for evaluating the anteroposterior relationship between the maxilla (the upper jaw) and the mandible (the lower jaw). This point represents the lowest point on the symphysis of the mandible and is instrumental in assessing both the vertical and horizontal relationships of these two key structures in orthodontics and cephalometric analyses.

Using Gnathion allows practitioners to analyze skeletal relationships accurately, including classifying the occlusion and positioning of the jaws in relation to each other. This point is particularly valuable in orthodontic treatment planning and monitoring changes over time, as it helps to provide insight into the overall facial harmony and function.

The other points, while important in certain contexts, do not directly assess the relationship between the maxilla and mandible in the same manner as Gnathion. Gonion pertains to the posterior angle of the mandible, and Infradentale is located at the gingival margin of the mandible. Pogonion represents the most anterior point of the chin. Each of these points has its own specific uses in cephalometric evaluations, but they do not focus on the maxilla-mandible relationship