Journal of the Faculty of Engineering and Architecture of Gazi University, vol.38, no.3, pp.1945-1952, 2023 (SCI-Expanded)
© 2023 Gazi Universitesi Muhendislik-Mimarlik. All rights reserved.In this study, a new posterior dynamic stabilization implant, which can help stabilize the spine normally, was designed using CAD commercial software programs and its biomechanical effects were determined and compared with the finite element (FE) method. Friction coefficient, material model, convergence analysis, loading and boundary conditions are defined for FE analysis. Two different implant and device components that maintain the range of motion within the standard limits were created with the SOLIDWORKS program, and ABAQUS CAD simulation program and MATLAB program were used together to calculate the range of motion. All implants are designed by choosing titanium material, the rod, screw, pin and nut components connecting the L4-L5 vertebrae. Lumbar spine models that are healthy and treated with two different implants were simulated under physiological conditions using scan data from computed tomography (CT). The range of motion, adjacent level effect and restoration percentages were calculated for all designed devices in six different directions. In the design of implant parts, 70% restoration percentage, which is an acceptable value in the movement of the spine with the implant, has been tried to be achieved in all directions. It has been determined that the device with the optimum data obtained provides more restoration in Z and Y directions. Restoration values are 33% for extantion, 53% for flexion, 55% and 68% for axial rotations and lateral bending, respectively. It can be said that pedicle-screw implants designed with this simulation study will be applicable after experimental validation and clinical trials.