Table 5.

Modeling of the reflection functions: Group L30—metal ceramic prostheses.

x	$\left[0,x_i\right)=\left[0,1\right)$	$\left[x_i,x_{\max }\right)=\left[1,3.25\right)$
ρ(x)	$f(x)=\frac{{\rho }_i-{\rho }_0}{x_i^2}{x}^2+{\rho }_0$	$g(x)={\rho }_0$
	$f(x)=3x^2+27$	$g(x)=25$
dρ/dx	$f^{\prime }(x)=2\frac{{\rho }_i-{\rho }_0}{x_i^2}x$	$g^{\prime }(x)=0$
	$f^{\prime }(x)=6x$
d2ρ/dx2	$f^{″}(x)=6{\mathrm{mm}}^{-2}$	$g^{″}(x)=0$