De Franco D J, Spiller R E, von Fraunhofer J A
U.S. Army Dental Corps, Fort Knox, Kentucky, USA.
Angle Orthod. 1995;65(1):63-72; discussion 73-4. doi: 10.1043/0003-3219(1995)065<0063:FRUTLW>2.0.CO;2.
Static frictional resistances were compared between Teflon-coated stainless steel and clear elastomeric ligatures used with various combinations of brackets and archwires. Stainless steel metal, polycrystalline ceramic and single crystal ceramic 0.022-inch slot brackets were used in combination with stainless steel and nickel titanium archwires, 0.018 inch and 0.016 x 0.022 inch. Friction was measured in the dry state at bracket-archwire angulations of 0, 5, 10, and 15 degrees. Moments induced by engagement of the archwires into the brackets were measured for each archwire type and bracket-archwire angulation. Teflon-coated ligatures produced less friction than elastomers for all bracket-archwire combinations. The ceramic brackets generally elicited greater frictional resistances than stainless steel brackets. Regarding both friction and control of tooth movement, these data suggest that sliding mechanics are best executed with stainless steel brackets and stainless steel archwires. Moreover, these data reveal the usefulness of Teflon-coated ligatures in minimizing the high friction of ceramic brackets when an esthetic appliance is imperative.
比较了涂有特氟龙的不锈钢结扎丝与透明弹性结扎丝在与各种托槽和弓丝组合使用时的静摩擦阻力。使用了不锈钢金属、多晶陶瓷和单晶陶瓷0.022英寸槽沟托槽，并与不锈钢和镍钛弓丝（0.018英寸以及0.016×0.022英寸）组合使用。在干燥状态下，于托槽-弓丝夹角为0、5、10和15度时测量摩擦力。针对每种弓丝类型和托槽-弓丝夹角，测量弓丝嵌入托槽时产生的力矩。对于所有托槽-弓丝组合，涂有特氟龙的结扎丝产生的摩擦力均小于弹性结扎丝。陶瓷托槽通常比不锈钢托槽产生更大的摩擦阻力。关于摩擦力和牙齿移动的控制，这些数据表明，使用不锈钢托槽和不锈钢弓丝时，滑动机制的执行效果最佳。此外，这些数据揭示了在必须使用美观矫治器时，涂有特氟龙的结扎丝对于最小化陶瓷托槽的高摩擦力的有用性。
