극돌기 간 삽입체의 스파이크에 대한 하중시험 및 유한요소 해석 = Loading Test and Finite Element Analysis of Spikes in Spinous Process Inserts

다국어 초록 (Multilingual Abstract)

The interspinous spacer (ISP) is a device that is inserted and fixed between the spinous processes at the back of the vertebral body to act as a cushion, enabling the distribution of loads on the spine and stabilization of the spine without performing a bone resection decompression surgery. This paper compares the strength of different models of interspinous spacers with varying lengths and shapes of spikes to enhance the mechanical strength and fixation of the spacer. To this end, mechanical property tests of interspinous spacers with different lengths were conducted to compare their strength. Additionally, finite element analysis was used to compare the mechanical test results and optimize the design to minimize failure of the interspinous spacer based on the shape of the spikes. The results of compression load tests with varying spike lengths of the interspinous spacers showed that the average yield load and ultimate load were higher for longer spikes compared to shorter spikes. Furthermore, the tensile and torsion test results showed values at least 1.8 times higher than the tensile yield load and torsion load specified by other certified products used clinically. Based on the results of the tensile and torsion tests, it was concluded that the interspinous spacer developed in this study can be reliably used in terms of strength.