Hi Gus, yes, perhaps it was badly explained. True, many saber are white under the chromings.
The saber blade has two main borders, one dull, the other edged, as a knife. As the saber is curved, necessarily there must be one concave and other convex.
Two curved blades are the saber and the scythe. In the saber, the border bearing a cutting edge is the convex, the concave being dull, while in the scythe, the reverse is the case. I said that the cutting edge was the concave in the scythe, while the reverse is truth for the saber.
The sabertooth's tooth is slightly compressed from side to side (never to the degree of a saber or scythe), and as it is curved, it has also one concave and one convex borders (posterior and anterior respectively). The posterior border (concave) is the most acute and cutting, and the cutting edge ocuppies it nearly entirely (only the distalmost portion of the convex anterior border bears a cutting edge, the rest is dull).
So, the sabertooth tooth is most similar to the scythe in that the blade border that cuts the better is the concave, opposite to the condition in the saber.