Fig. 6

A Linear regression between the surface of the frontal sinus (sup), in the ordinate, and the lower anterior skeletal vertical dimension (AHL), in the abscissa. B Linear regression between the volume quantities of the frontal sinus (vol), in the ordinate, and the lower anterior skeletal vertical dimension (AHL, in the abscissa. C Linear regression between the width of the frontal sinus (xmax), in the ordinate, and the lower anterior skeletal vertical dimension (AHL), in the abscissa. D Linear regression between the depth of the frontal sinus (ymax), in the ordinate, and the lower anterior skeletal vertical dimension (AHL), in the abscissa. E Linear regression between the height of the frontal sinus (zmax), in the ordinate, and the lower anterior skeletal vertical dimension (AHL), in the abscissa