Research On Intelligent Spinal Orthopedic System Based On 3D Printing

Scoliosis is a common spinal deformity disease in children and adolescents,and scoliosis braces are the first choice for non-surgical treatment of mild to moderate scoliosis patients.The production method of traditional orthoses is cumbersome and complicated,and the wearing accuracy is low.The orthopedic effect is greatly affected by the technical level of the rehabilitation technician.The patient adjusts the orthopedic brace manually in daily wearing,and there is no visual data.Reflecting the magnitude of the applied orthopedic force,patients usually do not know how to accurately apply the orthopedic force,so that the best treatment effect cannot be achieved in the actual treatment process.In this paper,according to the shortcomings of the existing spinal orthopedic braces,a research method of personalized intelligent spinal orthopedic system based on 3D printing is proposed.The specific contents are as follows:1.Firstly,a method for inverse reconstruction of the overall structure of the patient’s scoliosis was proposed.Based on the patient’s CT tomography data,CT image processing and analysis were performed to obtain the overall thoracic threedimensional model of the patient with scoliosis.The scoliosis characteristic curve was fitted according to the patient’s spine coordinate positioning data,and the patient’s Cobb angle was calculated.Based on the principle of three-point force scoliosis correction,the biomechanical validity of scoliosis correction was verified on the overall thoracic model of the patient,and the correction effect of different correction forces on scoliosis was judged.From the simulation results,it can be seen that the correction force is in about 45 N can meet the needs of spinal orthopedic effects,and provide a basis for the subsequent research and development of personalized orthopedic braces.2.The structural design of the personalized orthopedic brace includes two parts:the main structural design of the brace and the structural design of the brace adjustment system.The main structure design is based on the outer contour data of the patient’s body obtained by the 3D laser scanner,and the model is modeled and the pressure area and pressure release area are added.Results The personalized brace model was adjusted,and finally the left and right two-part models of the main body of the personalized orthopedic brace were obtained.The structure of the brace adjustment system selects the geared motor-pulley system as the power system of the device and conducts design verification,and finally assembles a personalized intelligent spinal orthopedic brace model.3.The control system design of intelligent orthopedic brace is composed of single chip system and other hardware.Each membrane pressure sensor module has been checked for performance before installation,and the signal output value has been error corrected in the main program;the main logic of the intelligent orthopedic brace control system involves manual control and automatic control.Manual control It is mainly operated by physical buttons.The built-in fuzzy control algorithm of the automatic control program indirectly controls the speed of the micro motor by outputting PWM values of different frequencies.The overall test results show that the main logic design of the system can work normally and stably.4.In the manufacturing and intelligent Io T design of personalized intelligent orthopaedic braces,the brace is manufactured with an industrial-grade light-curing 3D printer to create a physical model and perform printing error analysis;the intelligent Io T design of the brace is based on wireless connection design,Io T platform There are three major parts: development and We Chat applet development.The wireless module is used to connect the intelligent orthopaedic brace to the Io T platform through the MQTT communication protocol.The program can control the operation of the entire smart brace in real time;in the actual wearing test of patients,various data are in line with expectations,and the actual wearing comfort and satisfaction are better,and the wearing process will not affect daily life.