A Comparison of the Ligation Torque Expression of a Ribbonwise Bracket–Archwire Combination and a Conventional Combination: A Primary Study

Figure 2

Schematic of the torsion application system. Sagittal view of new ribbonwise bracket during its realization of “ligation torque expression.” (a) No torque will be transmitted when any archwires are placed vertically in the 0.030″ × 0.022″ slot since the slot is much larger. (b) The steel ligatures were tightened as tight as possible thus the archwire was securely pressed onto the slot bottom. (c) Torque will be derived from the contact of the slot bottom and the ligature wire, then torque will be expressed in the arrow direction.

(a)

(b)

(c)