การวิเคราะห์และพัฒนาวัสดุทดแทนหมอนรองกระดูกสันหลังส่วนเอวเพื่อเพิ่มประสิทธิภาพสำหรับสรีระของคนเอเชียด้วยวิธีไฟไนต์อิลิเมนต์

Abstract

As nowadays, Degenerate Disc Diseased can occur in patients of many ages group. Caused by aging deterioration or non-ergonomic behavior. This brings about spinal diseases by myelopathy and leads to back pain that affects daily life. The most popular and effective treatment method is insertion disc replacement in abnormal areas. Therefore, the organizer studied and designed tooth features on the surface of disc replacement with optimal pressure performance. To reduce the Subsidence and migration during use, thus causing harm to patients. The variables in this study include the angle of teeth, length of upper cut and the pattern of the teeth’s center. Mechanical testing of disc replacement according to Intervertebral Body Fusion Devices (ASTM F2077), Static Axial Compression test by using the finite element analysis in Autodesk Inventor Nastran. Test force set to 1200 N. The stress distribution trend is observed and compares the performance of with various tooth characteristics. The findings indicated that increasing the length of upper cut increases the bearing area, thus making the bearing force greater. And Teeth at 60° can receive more force than 90° and having a higher resistance to expulsion. Moreover, the normal tooth has less Von-Mises Stress because there is more volume.