Figure 2. Parameters measured or calculated in the profile: w = the maximum width of the molar as seen in the profile, x and y are the limits of the occlusal concavity, b = the distance between x and y, h is the maximum depth of the concavity, S is the surface of the area enclosed by b and the occlusal profile; b1 and b2 are the portions of b defined by its intersection with h. r = the radius of the best-fitting circle, dist = the distance from the circle center to the occlusal profile, dev = dist - r.