Lang R L, Sandrik J L, Klapper L
Am J Orthod. 1982 Jan;81(1):22-31. doi: 10.1016/0002-9416(82)90284-6.
Buccal tubes from five manufactures producing the new generation of preadjusted (straight wire type) appliances were tested to determine the amount of rotation various-sized rectangular wires produced prior to binding within the tube. This rotation reflected the amount of torquing force dissipated because of the interaction of the wires and tube. In addition, it indicated the degree of compensatory third-order bends needed in the wire to deliver the desired torque force to the tooth. Wire and tube dimensions were measured and compared to manufacturers' stated specifications. The amount of rotation for each manufacturer's tube was compared to the theoretical values based on calculations. Theoretical calculations and published charts of deflection angles based on these calculations give a false impression in that they do not revealed a true expression of the amount of torque dissipated through rotation of the rectangular wire in that tube. There is variation between the manufacturer's stated lumen dimension and the actual lumen size, even beyond the manufacturer's stated tolerances. Rectangular wire will rotate within a rectangular buccal tube to varying degrees, depending upon the size of the wire used and the manufacturer of the appliance. This means that additional torsion or angulation may need to be placed in the wire prior to application intraorally. The amount of this additional torquing of the arch wire will depend upon the manufacturer of the appliance used and will vary from tube to tube of the same manufacturer.
对五家生产新一代预成（直丝弓型）矫治器的制造商的颊面管进行了测试，以确定不同尺寸的矩形弓丝在管内结扎前产生的旋转量。这种旋转反映了由于弓丝与颊面管相互作用而消散的扭矩力大小。此外，它还表明了为使牙齿获得所需扭矩力，弓丝中需要的补偿性三阶弯曲程度。测量了弓丝和颊面管的尺寸，并与制造商公布的规格进行了比较。将每个制造商颊面管的旋转量与基于计算得出的理论值进行了比较。理论计算以及基于这些计算的已发表的偏转角图表给人一种错误的印象，即它们没有真实反映出矩形弓丝在该颊面管内旋转所消散的扭矩量。制造商公布的管腔尺寸与实际管腔大小之间存在差异，甚至超出了制造商规定的公差范围。矩形弓丝在矩形颊面管内的旋转程度会有所不同，这取决于所使用弓丝的尺寸和矫治器的制造商。这意味着在口腔内应用之前，可能需要在弓丝上额外施加扭转或角度调整。弓丝这种额外扭矩的大小将取决于所使用矫治器的制造商，并且同一制造商的不同颊面管之间也会有所差异。
