Orthodontic brackets with elongate film hinge

An orthodontic bracket comprising:

• a bracket base;
• at least one arch wire slot in the bracket base slot adapted to receive an arch wire therein;
• a ligation cover hingedly connected to the bracket base and selectively rotatable relative to the bracket base between an open, non-ligating position relative to the arch wire slot and a closed, ligating position relative to the arch wire slot;
• an elongate film hinge attached at one end to the bracket base and at an opposite end to the ligation cover so as to hingedly connect the ligation cover to the bracket base;
• and
• a cam structure that is attached to an inner surface of the ligation cover and that extends toward the bracket base, the cam structure comprising:
• a camming surface that is at least partially curved and that interacts with the bracket base so as to bias the ligation cover toward the open, non-ligating position;
• and
• a curved surface, proximal to the film hinge and opposite the camming structure, around which the elongate film hinge bends so that the film hinge bends, and bending forces are distributed, over a significant portion of its entire length when the ligation cover is selectively rotated relative to the bracket base