Figure 1: Relationship between RTA and LTA and distribution of force in occlusal contacts presented as a percentage in relation to the left side. This line is the regression equation; the ratio of RTA/LTA = 2.81 (constant beta) − 0.027 (beta for interproximal contacts) * interproximal contacts. This line shows the direction of the relationship, with an increase in contacts between the teeth, reducing RTA to LTA ratio. The squared = 0.95 means that the change in the value of “interproximal contacts (left%)” at 9.5% is based on changes in the value of “the ratio of RTA/LTA.”