[Statics of complete prostheses. 2]

The statics of prostheses in complete absence of teeth is discussed with analysis of the effect of the position of the masticating surfaces of artificial teeth on the values of forces disturbing the balance of the prosthesis during mastication. Considering the friction forces active during mastication, the worse fixation of lower prostheses, and the lateral position of the mandible in relation to the maxilla the author describes as optimal such a spatial arrangement of artificial teeth that in centric occlusion the interalveolar line passes through the centre of their masticating surfaces which are perpendicular to it.