Comparative analysis of real and ideal wire-slot play in square and rectangular archwires

Abstract

Objective: 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. Materials and Methods: 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. Results: The real height and width of the archwires differed from those stated by the manufacturers, falling within the range 26.47% 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. Conclusions: The archwire-slot play was greater than the ideal for each archwire considered, inevitably leading to a loss of information within the system. (Angle Orthod. 2015;85:848-858.)

In vitro evaluation of frictional force of a novel elastic bendable orthodontic wire

“…A possible explanation for this difference in frictional resistance was the disparity in wire-bracket slot play. As the heights, widths, and cross sections of rectangular orthodontic wires affect the play between the wires and the bracket slot, 19 the degrees of play of 0.016-inch round and 0.016 3 0.022-inch and 0.017 3 0.025-inch rectangular wires in the 0.018-inch slots can be assumed to be greater than those of 0.018inch round and 0.017 3 0.025-inch and 0.019 3 0.025inch rectangular wires in a 0.022-inch slot.…”

Validation of Commonly Used Rectangular Nitinol Arch Wire Dimensions Using Stereomicroscope - An Invitro Study

“…They found that the real height and width of the archwires differed from those stated by the manufacturers. 7 The present study was done to compare the archwire dimensions between three different companies (Modern Orthodontics, Prime orthodontics and Captain Orthodontics and compare the dimensions with the standard value published by the manufacturer.…”

Avaliação da profundidade da canaleta dos bráquetes autoligados passivos associados à expressão do torque

“…A expressão do torque está diretamente ligada as variações estruturais que podem ser encontradas nos bráquetes (dimensões e forma das canaletas, e material de fabricação), e nas variações dimensionais e estruturais dos fios ortodônticos (Badawi et al, 2008;Archambault et al, 2010;Major et al, 2011;Streva et al, 2011;Franco et al, 2015;Lombardo et al, 2015;Lee et al, 2016). provavelmente porque em 12º, e em 24º o momento de torque ocorreu dentro do limite, ou muito próximo ao valor mensurado da folga nos bráquetes H4.…”

“…Outro fator relevante a ser mencionado é que os resultados obtidos nessa pesquisa podem apresentar diferenças nos valores nominais quando comparados a outros estudos (Badawi et al, 2008;Archambault et al, 2010;Franco et al, 2015), pelo fato do fio de aço inóxidável apresentar diferenças em sua propriedade e composição estrutural, em diferentes marcas comerciais (Gioka;Eliades, 2004;Vena et al, 2007;Lombardo et al, 2015).…”

“…Tem sido demonstrado que existem discrepâncias significativas entre o valor fornecido pelos fabricantes e o valor mensurado (Cash et al, 2004;Gioka;Eliades, 2004). As alterações da expressão do torque podem ser atribuídas as variações intrínsecas do diâmetro transversal dos fios ortodônticos, na deformação das canaletas dos bráquetes, e em suas dimensões (Meling et al, 1998;Gioka;Eliades, 2004;Archambault et al, 2010;Major et al, 2010;Melenka et al, 2013;McLaughlin;Bennett, 2015;Brown et al, 2015;Lee et al, 2016;Lombardo et al, 2015).…”