Use a ruler to connect the tip of the nose, upper and lower lips and chin. These three points can be connected on the 1 line under normal face shape. If not, it is usually that the chin can't be connected. The facial pattern of this condition is mostly maxillary protrusion or mandibular retraction. You can measure it with a ruler in this way.

Conventional or nozzle

The convex mouth is divided into bony protrusion, dentate protrusion, bony protrusion and dentate protrusion. You need to smile and take a 90-degree silhouette to tell.

Bone process

1. Skeletal protrusion: the teeth are vertical and the whole body floats outward.

Tooth protrusion

2. Tooth protrusion: The teeth are not vertical and float outward.

3. Bone protrusion and odontoid process: the combination of their characteristics.