The Airway Volume Related to the Maxillo-Mandibular Position Using 3D Analysis

Figure 1

Cephalometric points used in the Steiner, McNamara, and Ricketts techniques. (a) Steiner analysis: the anteroposterior positions of the maxilla (S-Na) and mandible (S-N-B) and angulation of the mandibular plane (S-N/Go-Ng) were determined. (b) McNamara analysis: the anteroposterior positions of the maxilla (Na-perpendicular-A) and mandible (Na-perpendicular-Pog) and angulation of the mandibular plane (Po-Or/Go-Me) were determined. (c) Ricketts analysis: the anteroposterior positions of the maxilla (Frankfort Plane-Na-A) and mandible (Frankfort Plane-Na-Pog) and angulation of the mandibular plane (Po-Or/Go-Gn) were determined.

(a)

(b)

(c)