Mechanical Analysis Of U Type Kirschner Wire In Traction Orthodontic Device

It is a basic strategy for orthopaedic medicine using the external fixation technology to correct the limbs with complex deformity.With the development of biomechanics,medical engineers and clinicians are constantly improving the traction devices with different functions in order to enhance the therapeutic effect.While achieving significant therapeutic effect,precise quantification and IIIsafety assessment of traction treatment plan are particularly important.This article mainly focuses on the U-type Kirschner wire,a key component of an orthosis.We evaluated the safety and reliability of the application to clinical treatment through the experimental analysis of its mechanical properties and the simulation of its large deflection bending conditions with finite element method,and put forward suggestions for the optimization of the device scheme for the treatment of similar diseases,We hope the research results can provide theoretical basis and technical guidance for clinical traction orthodontic work.The specific work are as following:(1)conducted large deflection bending experiments of the Kirschner wire simulating the condition when applied to orthosis.The elastic value of two ends of the specimen with different specifications under compression and bending is measured.The elastic formula of Kirschner wire was fitted combined the experimental data when it is deformed by large deflection,and the mechanical stability of traction orthodontics with U-shaped Kirschner wire as the key component was evaluated.(2)A finite element model reflecting the basic structural features of K-wires was established.The effectiveness of the established model was verified based on experimental data.The mechanical response of Kirschner wire under different bending degree was simulated,achieving the stress distribution and maximum stress concentration area when K-wire was bent.We can Change the parameters to find out the load level under different combinations of specifications and use it as a reference for clinical traction planning.(3)According to the problems during the use of existing devices,suggestions for improvement were proposed and a new set of orthodontic devices was designed to provide more convenient services for clinical work and meet the needs of patients.The results of the study evaluate the mechanical stability of devices and served as a numerical reference and basis for the clinical development of traction treatment protocols.The adoption of new devices may make the treatment process more reasonable.