Lombardo Luca, Arreghini Angela, Bratti Elena, Mollica Francesco, Spedicato Giorgio, Merlin Mattia, Fortini Annalisa, Siciliani Giuseppe
a Adjunct Professor, Postgraduate School of Orthodontics, University of Ferrara, Ferrara, Italy.
b Research Assistant, Postgraduate School of Orthodontics, University of Ferrara, Ferrara, Italy.
Angle Orthod. 2015 Sep;85(5):848-58. doi: 10.2319/072214-510.1. Epub 2014 Nov 18.
To evaluate the degree to which the height, width, and cross-section of rectangular and square orthodontic archwires affect the play between the archwires and the bracket slot.
The stated measurements (height and width) of 43 archwires from six different manufacturers were compared with real values obtained using a digital gauge. The curvature (radius) of the edge bevels was also measured to calculate the play within the slot, and this measurement was compared with the ideal value.
The real height and width of the archwires differed from those stated by the manufacturers, falling within the range -6.47% and +5.10%. The curvature of each bevel on each archwire cross-section was shown to differ, and consequently increased the real play between the archwire and slot with respect to the ideal to different degrees.
The archwire-slot play was greater than the ideal for each archwire considered, inevitably leading to a loss of information within the system.
评估矩形和方形正畸弓丝的高度、宽度及横截面在多大程度上影响弓丝与托槽槽沟之间的间隙。
将来自六个不同制造商的43根弓丝的规定尺寸（高度和宽度）与使用数字测量仪获得的实际值进行比较。还测量了边缘斜面的曲率（半径）以计算槽沟内的间隙，并将该测量值与理想值进行比较。
弓丝的实际高度和宽度与制造商所述的不同，落在-6.47%至+5.10%的范围内。每根弓丝横截面上每个斜面的曲率均显示出差异，因此相对于理想情况，不同程度地增加了弓丝与槽沟之间的实际间隙。
对于所考虑的每根弓丝，弓丝-槽沟间隙均大于理想值，不可避免地导致系统内信息丢失。
