Washington Bradford, Evans Carla A, Viana Grace, Bedran-Russo Ana, Megremis Spiro
a Private practice, New York, NY.
Angle Orthod. 2015 Jan;85(1):95-101. doi: 10.2319/092513-701.1.
To test for differences in loading and unloading forces delivered by six coated nickel-titanium wires and their noncoated equivalents.
From six commercial companies, 0.016-inch diameter round and 0.016 × 0.022-inch rectangular cross-section nickel-titanium wires were procured "as is": Rocky Mountain Orthodontics (Denver, Colo), TP Orthodontics (La Porte, Ind), American Orthodontics (AO; Sheboygan, Wis), G&H (Franklin, Ind), Opal Orthodontics (South Jordan, Utah), and Forestadent USA (St Louis, Mo) (round only). The wires were evaluated using a three-point bending test based on the method in ISO Standard 15841.
No statistically significant differences (P > .05) in force values were found between coated and noncoated wires, listed by deflection in three-point bending, for these specific groups: 1 mm, TP round; 2 mm, TP round and G&H rectangular; 3 mm, G&H round and G&H rectangular; 2.5 mm,TP round and G&H rectangular; 1.5 mm, TP round, G&H round, G&H rectangular, and AO rectangular; and 0.5 mm, AO rectangular and G&H round.
Some manufacturers market esthetic wires delivering forces similar to the equivalent noncoated wires, when tested according to a standard three-point bend method.
测试六种涂层镍钛丝及其未涂层对照丝在加载和卸载力方面的差异。
从六家商业公司采购了直径0.016英寸的圆形和0.016×0.022英寸矩形横截面的镍钛丝，原样采购：落基山正畸公司（科罗拉多州丹佛）、TP正畸公司（印第安纳州拉波特）、美国正畸公司（AO；威斯康星州希博伊根）、G&H公司（印第安纳州富兰克林）、蛋白石正畸公司（犹他州南乔丹）和美国福雷斯塔登特公司（密苏里州圣路易斯）（仅圆形）。根据ISO标准15841中的方法，使用三点弯曲试验对这些丝进行评估。
对于这些特定组，在三点弯曲挠度列出的涂层丝和未涂层丝之间，未发现力值有统计学显著差异（P>.05）：1毫米，TP圆形；2毫米，TP圆形和G&H矩形；3毫米，G&H圆形和G&H矩形；2.5毫米，TP圆形和G&H矩形；1.5毫米，TP圆形、G&H圆形、G&H矩形和AO矩形；以及0.5毫米，AO矩形和G&H圆形。
根据标准三点弯曲方法测试时，一些制造商销售的美观丝所传递的力与等效的未涂层丝相似。
