Springback mechanism analysis and experimentation of orthodontic archwire bending considering slip warping phenomenon

Abstract

Malocclusion is a common oral disease. Fixed appliance technology is the most common and effective malocclusion orthodontic treatment method, and the key step of fixed appliance technology is the bending of orthodontic archwire. Because the slip warping phenomenon exists in the process of orthodontic archwire bending, it is difficult to realize rapid and accurate bending of the customized orthodontic archwires. A bending springback mechanism model considering the slip warping of the archwire in the process of bending is established. The influence of the slip warping phenomenon of the archwire between the fixed mold and the rotation mold is considered in the analysis of the springback mechanism. The bending process of archwire is divided into two stages: elastic deformation and plastic deformation, based on the variety of the bending radius in the bending process. A springback mechanism model of the orthodontic archwire is established. The springback mechanism model of the orthodontic archwire is analyzed and compensated based on the characteristics of the robot structure. An archwire bending experiment is carried out to verify the correctness of the springback mechanism model of the orthodontic archwire.

Modeling and Experimentation of the Unidirectional Orthodontic Force of Second Sequential Loop Orthodontic Archwire

“…Loop Unidirectional Orthodontic-Force. Sequential loop is one of the basic loading units of orthodontic-force [33][34][35].…”

Robotic Applications in Orthodontics: Changing the Face of Contemporary Clinical Care

“…Different types of arch wire bending robots have been proposed in the last decade including the Motoman UP6 robot, optimizing bending process and properties [80,[82][83][84], LAMDA system (Lingual Arch wire Manufacturing and Design Aid), bending only 1st-order bends in the XY plane [29], motion planning and synchronized control of the dental arch generator of the multimanipulator automatic tooth arrangement robot [85,86], Cartesian type arch wire bending robot using the third-order S addition and subtraction curve control method of the motor to bend the arch wire [81,87], an end effector for arch wire bending robot that could change the pincer automatically, as needed [88], wire bending robots considering the slip warping phenomenon that exists during wire bending, thus compensating for the spring back of the arch wire [89][90][91] and greatly improving the bending precision, and robots using the Bessel curve to carry out the control point planning and angle planning showing practicality in clinical treatment [92]. Different The technological advance of a system may be described using the technological readiness level (TRL 1-9) introduced by Mankins in 1995 [59].…”

Digital expression and interactive adjustment method of personalized orthodontic archwire for robotic bending

“…The bending of the second sequence curve can be realized by these movements. And an archwire can be bent by the combination of these movements of the orthodontic archwire bending robot (Jiang et al, 2018). The experimental bending process is shown in Fig.…”

“…Digital forming technology is used more and more extensively in the modern field of orthodontics to treat the malocclusion (Schmidt et al, 2018), such as dental 3D digital reconstruction technology, digitalized brackets indirect bonding technology and orthodontics archwire bending robotic technology (Castro et al, 2018). Clinically, orthodontic archwire-assisted forming equipment and orthodontic archwire bending machines have been used to bend orthodontic archwires (Jiang et al, 2018), such as the Suresmile system. However, the variation of human teeth is not only related to race and gender, but also the difference of individual development.…”