Huffman D J, Way D C
Am J Orthod. 1983 Jun;83(6):453-9.
A clinical study was conducted to compare the amount and rate of movement and the tipping of canines retracted on 0.016 inch and 0.020 inch round wire with a continuous force of 200 grams and medium-width 0.022 inch by 0.028 inch nonangulated Siamese brackets. On one side canines were retracted on 0.016 inch wire and on the other side of the same arches, on 0.020 inch wire. Over 10 weeks, the mean amount of movement for twenty-one canines on the 0.016 inch wire was 3.37 mm., and for the twenty-one canines on the 0.020 inch wire it was 2.99 mm. The mean rate of movement in twenty-five arches was 1.37 mm. per month on the 0.016 inch wire and 1.20 mm. per month on the 0.020 inch wire. Over a period of 10 weeks, the mean amount of tipping for seventeen canines on the 0.016 inch wire was 5.3 degrees, and for the seventeen canines on the 0.020 inch wire it was 1.7 degrees. Since less tipping occurred on the 0.020 inch wire and the rates of movement were similar, there appears to be an advantage in retracting canines along 0.020 inch round wire rather than on 0.016 inch round wire. It would seem, also, that a greater force is not required to slide a tooth bonded or banded with an 0.022 by 0.028 inch bracket slot along an 0.020 inch round wire than along an 0.016 inch round wire as some laboratory studies suggest.
进行了一项临床研究，以比较在200克持续力作用下，使用0.016英寸和0.020英寸圆形钢丝以及中等宽度0.022英寸×0.028英寸非成角孪生托槽时，尖牙的移动量、移动速率和倾斜情况。在同一牙弓的一侧，尖牙使用0.016英寸钢丝进行内收，在另一侧则使用0.020英寸钢丝。在10周的时间里，使用0.016英寸钢丝的21颗尖牙的平均移动量为3.37毫米，而使用0.020英寸钢丝的21颗尖牙的平均移动量为2.99毫米。在25个牙弓中，使用0.016英寸钢丝时的平均移动速率为每月1.37毫米，使用0.020英寸钢丝时为每月1.20毫米。在10周的时间里，使用0.016英寸钢丝的17颗尖牙的平均倾斜量为5.3度，而使用0.020英寸钢丝的17颗尖牙的平均倾斜量为1.7度。由于在0.020英寸钢丝上发生的倾斜较少，且移动速率相似，因此沿着0.020英寸圆形钢丝内收尖牙似乎比沿着0.016英寸圆形钢丝更具优势。此外，正如一些实验室研究表明的那样，对于使用0.022×0.028英寸托槽槽沟粘结或带环的牙齿，沿着0.020英寸圆形钢丝滑动所需的力似乎并不比沿着0.016英寸圆形钢丝滑动时更大。
