Melenka Garrett W, Nobes David S, Major Paul W, Carey Jason P
Department of Mechanical Engineering, Faculty of Engineering, University of Alberta, Edmonton, AB, Canada.
J Dent Biomech. 2013 Jun 6;4:1758736013492529. doi: 10.1177/1758736013492529. Print 2013.
Braces are used by orthodontists to correct the misalignment of teeth in the mouth. Archwire rotation is a particular procedure used to correct tooth inclination. Wire rotation can result in deformation to the orthodontic brackets, and an orthodontic torque simulator has been designed to examine this wire-bracket interaction. An optical technique has been employed to measure the deformation due to size and geometric constraints of the orthodontic brackets. Images of orthodontic brackets are collected using a stereo microscope and two charge-coupled device cameras, and deformation of orthodontic brackets is measured using a three-dimensional digital image correlation technique. The three-dimensional deformation of orthodontic brackets will be evaluated. The repeatability of the three-dimensional digital image correlation measurement method was evaluated by performing 30 archwire rotation tests using the same bracket and archwire. Finally, five Damon 3MX and five In-Ovation R self-ligating brackets will be compared using this technique to demonstrate the effect of archwire rotation on bracket design.
正畸医生使用牙套来矫正口腔中牙齿的排列不齐。弓丝旋转是一种用于矫正牙齿倾斜的特定程序。弓丝旋转会导致正畸托槽变形，并且已经设计了一种正畸扭矩模拟器来研究这种弓丝与托槽的相互作用。由于正畸托槽的尺寸和几何限制，已经采用了一种光学技术来测量变形。使用立体显微镜和两个电荷耦合器件相机收集正畸托槽的图像，并使用三维数字图像相关技术测量正畸托槽的变形。将评估正畸托槽的三维变形。通过使用相同的托槽和弓丝进行30次弓丝旋转测试，评估了三维数字图像相关测量方法的可重复性。最后，将使用该技术比较五个Damon 3MX和五个In-Ovation R自结扎托槽，以证明弓丝旋转对托槽设计的影响。
