Pontifical Catholic University of Paraná, Rua Imaculada Conceição 1155, Curitiba, PR, Brazil.
Braz Oral Res. 2010 Jan-Mar;24(1):40-5. doi: 10.1590/s1806-83242010000100007.
The aim of this study was to evaluate, in vitro, frictional forces produced by ceramic brackets and arch wires of different alloys. Frictional tests were performed on three ceramic brackets: monocrystalline (Inspire ICE), polycrystalline (InVu), polycrystalline with metal slot (Clarity), and one stainless steel bracket (Dyna-Lock). Thirty brackets of each were tested, all with .022' slots, in combination with stainless steel and nickel-titanium wires .019' x .025', at 0 degrees and 10 degrees angulation, in artificial saliva. Arch wires were pulled through the slots at a crosshead speed of 10 mm/min. There were statistically significant differences between the groups of brackets and wires studied (p < .05). The polycrystalline brackets with metal slots had values similar to those of conventional polycrystalline brackets, and the monocrystalline brackets had the highest frictional forces. The nickel-titanium wires produced the lowest friction. The addition of metal slots in the polycrystalline brackets did not significantly decrease frictional values. Nickel-titanium wires produced lower friction than those of stainless steel.
本研究旨在评估不同合金的陶瓷托槽和弓丝产生的摩擦力。对三种陶瓷托槽进行了摩擦测试：单晶（Inspire ICE）、多晶（InVu）、多晶带金属槽（Clarity）和一种不锈钢托槽（Dyna-Lock）。每个都测试了 30 个，均带有.022'槽，与不锈钢和镍钛丝.019' x.025'搭配，在 0 度和 10 度角度，在人工唾液中。弓丝以 10mm/min 的十字头速度穿过槽。研究的托槽和弓丝组之间存在统计学差异（p <.05）。带金属槽的多晶托槽的数值与传统多晶托槽相似，单晶托槽的摩擦力最高。镍钛丝产生的摩擦力最小。多晶托槽中添加金属槽并没有显著降低摩擦力值。镍钛丝产生的摩擦力小于不锈钢丝。
