Loops function better when activation "closes them" instead of "opening them': Because these are
elastic alloys (TMA), they always tend to recuperate their initial shape, so they have a greater tendency to recuperate their initial shape if activation doses them instead of opening them, In this manner, closed loops close spaces better, and open loops open spaces better.
• Principle 2.
Loops function better when their form is perpendicular to the movement they must perform. This
way vertical loops perform horizontal movements better (mesiodistal movements for example), and horizontal
loops perform vertical movements better (intrusion/extrusion movements for example),
The more wire a loop has, less force it will exert. Loops with helixes have more wire length, and because the
force exerted by a wire is inversely proportional to the cube of its length, the force exerted by the wire over the teeth is less.