DEFINITIONS IN ORTHODONTICS

🔸BINDING: During tooth movement along an archwire, a high couple occurs between bracket and wire, owing to overtipping of the tooth. Binding is the locking of these two materials due to friction. As a result of binding, tooth movement stops. Binding can also occur during sliding of the wire in en masse movements.

🔸BOWING EFFECT: Increase overbite by incisor extrusion after a straight wire is placed in incisor brackets and angulated canine brackets.

🔸BREAKING POINT: The point at which a wire material fails.

🔸CENTER OF ROTATION: The imaginary point around which a tooth rotates. The location of this point changes depending on the force system applied to the tooth (ie, the moment/force ratio).

🔸CORROSION: Loss of weight of metal and change of its mechanical properties under various chemical influences.

🔸COUPLE: A system having two equal and parallel forces acting in opposite directions. Every point on the object to which a couple is applied is under a rotational influence in the same direction and magnitude. The object rotates about its center of