Tooth Shape To Eliminate Horizontal Force Component

¹ National Biomedical Research Foundation, Silver Spring, Maryland

It is best to choose S_d for the minimum values of S_m for which Eq. (5) holds. Table 1 gives such values. It turns out that for sagittal angles of chew less than about 78 degrees, the angle required for the mesial slope becomes too steep for practical application. However, a sagittal angle of chew of less than 78 degrees is rarely if ever seen clinically.^2-5

Note from Figure 2 that the maximum of F_ed gives the value of F_em for which the corresponding angle S_m is a minimum. To find the maximum of F_ed, form [See Equation In PDF File] For [See Equation In PDF File] we have [See Equation in PDF File] The values of S_d in the above table satisfy this equation. Manufacturers of artificial teeth should take the results in Table 1 into account when designing the mesial and distal slopes of their teeth.