BIO-ACTIVE is a shape memory archwire exerting progressive forces, from the midline to the posterior sectors. Its forces are consistent with those found to be biologically necessary to move each individual tooth along the arch:
In order to use shape memory at its best, cool the archwire before its insertion.
Some archwires are available with a central V-Bend (or «dimple»). And then, a letter D appears in the P/N.