Fischer-Brandies H, Orthuber W, Pohle L, Sellenrieck D
Klinik für Kieferorthopädie, Christian-Albrechts-Universität zu Kiel.
J Orofac Orthop. 1996 Feb;57(1):16-23. doi: 10.1007/BF02189044.
With the bending art system (BAS) the computerized production of individual arch wires has become possible. The BAS consists of an intraoral camera, a computer program and a bending machine producing the archwire by consecutive bending and twisting procedures. This study examines the accuracy of the bending machine when using 0.016" x 0.016" and 0.016" x 0.022" steel wire of rectangular cross-section. Bending angles ranging from 6 degrees to 54 degrees, and torsion angles ranging from 2 degrees to 35 degrees were tested; also the minimum distance between these individual operations was determined. The bent pieces of wire were analysed in a 3D-coordinate gauging system. The 0.016" x 0.016" steel wire showed a mean measuring error of 0.62 degree in bending procedures and of 0.72 degree in torsion procedures, whereas the 0.016" x 0.022" steel wire showed an error of 0.87 degree with edgewise bendings and of 0.86 degree with torsions. To ensure this accuracy a minimum distance of 0.5 mm to 0.7 mm, depending on which kind of bending combination is used, between bending and torsion is required. The error could be reduced even further if a more constant wire material and a more accurate calibration of the bending machine were used. All in all the precision of the bending machine meets the clinical requirements.
借助弯制技术系统（BAS），实现了个性化弓丝的计算机化生产。BAS由一台口腔内摄像头、一个计算机程序和一台通过连续弯曲和扭转程序制作弓丝的弯丝机组成。本研究检验了弯丝机在使用0.016英寸×0.016英寸和0.016英寸×0.022英寸矩形横截面钢丝时的准确性。测试了6度至54度的弯曲角度以及2度至35度的扭转角度；还确定了这些单独操作之间的最小距离。在三维坐标测量系统中对弯制的钢丝段进行分析。0.016英寸×0.016英寸的钢丝在弯曲程序中的平均测量误差为0.62度，在扭转程序中的平均测量误差为0.72度，而0.016英寸×0.022英寸的钢丝在边缘弯曲时的误差为0.87度，在扭转时的误差为0.86度。为确保这种准确性，根据所使用的弯曲组合类型，弯曲和扭转之间需要0.5毫米至0.7毫米的最小距离。如果使用更均匀的钢丝材料并对弯丝机进行更精确的校准，误差可以进一步降低。总体而言，弯丝机的精度符合临床要求。
