Abstract:Abstract: Objective Based on the finite element simulation analysis of the patient's torso spine model and combined with theoretical calculation data, a scoliosis orthotic device is designed, and the effectiveness of the orthotic device is verified through 3D printing. Method Taking a patient with idiopathic scoliosis as the research object, reverse engineering technology and computer-aided technology were used to establish a patient torso spine model. The finite element method was used to analyze the model, and the optimal position and size of the corrective force were determined by combining literature theory calculation. Based on this, an orthosis device was designed. To verify the corrective effect, compared and evaluated the patient's X-ray before and after the patient wore the orthotic device, and followed up for six months. Results The optimal position and magnitude of the initial corrective force were determined through theoretical calculations and finite element simulations. Specifically, a corrective force of 62.95N was applied to the L3 vertebral body and the left posterior region corresponding to the upper and lower intervertebral discs in the patient's lateral curvature segment of the spine to achieve the best corrective effect. On this basis, the structure of the orthosis was designed, followed by relevant experimental tests before and after wearing the designed orthosis. By comparing the X-ray images of patients before and after wearing the orthosis device and combining them with follow-up data six months later,, it can be concluded that the optimized design of the orthosis meets the expected clinical requirements for corrective effects. Conclusions Orthopedic design should be based on the specific situation of the patient's scoliosis. Throughout the design process, the finite element method was used to analyze the patient's torso spine finite element model, and theoretical calculations were used to determine the optimal position and size of the initial corrective force. The effectiveness of this design was verified through the comparison of X-ray images before and after the patient wore the orthotic device, as well as follow-up data six months later. This will provide strong support for the treatment of scoliosis patients in the future.