具雙向可變形的脊椎融合器設計製作與檢測

Design, Manufacture, Analysis, and Testing of a Spinal Fusion Cage with a Bidirectional Expandable Design

賴峯民(FENG-MIN LAI)；紀昕佑(XIN-YOU JI)；李瑞恆(RA-HAN LEE)；黃鈺琇(YU-XIU HUANG)

3D列印 ； 可變型 ； 脊椎融合器 ； Ansys分析 ； 熱處理 ； 抗彎強度 ； 3D printing ； deformable ； spinal fusion cage ； Ansys analysis ； heat treatment ； flexural strength

科學與工程技術期刊

19卷1期（2023 / 03 / 01）

29 - 34

繁體中文;英文

本文主要設計開發可變形脊椎融合器（Cage），對其進行結構設計、Ansys分析及製造，及本文探討3D列印多孔鈦合金試片之熱處理溫度對三點彎曲的抗彎強度之影響。在Cage設計製造部分，利用SolidWorks繪圖設計的Cage繪製成圖檔，接著於SolidWorks中模擬Cage運作之情形，完成後匯入CNC加工機進行列印上下面板及實心傳動元件，並將完成的元件組合成Cage成品，再測試Cage產品運作流暢度，且Cage實體量測後得知可擴展高度25%及擴展寬度17%。為了確保可變型脊椎融合器安全性，以防止受力過大而導致崩毀，對Cage施於400 N作用力的Ansys模擬分析及力學行為之研究。另外會利用3D列印多孔鈦合金試片用不同熱處理溫度做實驗，並進行三點彎曲實驗，其最適化熱處理500℃試片，經模擬分析與實驗的位移量分別為1.539 mm與1.738 mm，Ansys分析模型可證實是有分析參考價值，並證明熱處理確實可以增加試片的楊氏係數和抗彎強度。

This study developed a spinal fusion cage with a bidirectional expandable design and evaluated the effect of heat treatment on the flexural strength of three-dimensional (3D)-printed porous titanium alloy specimens. The cage was designed in SolidWorks and fabricated in a computer numerical control machine. Tests were conducted to evaluate the fluency of the cage. The experimental results indicated that the cage height can be increased by 25% and the width can be increased by 17%. Structural analysis in Ansys revealed that the cage can withstand 400 N. In addition, 3D-printed porous titanium alloy specimens were fabricated for use in heat treatment experiments that used three-point bending. According to the experimental results, the displacements of the test piece heated to 500 °C were 1.539 and 1.738 mm. Structural analysis results indicated that heat treatment increased the Young’s modulus and flexural strength of the test pieces.

1. Ashkan, S.,Anthony, A.(2016).Printing Technologies for Medical Applications.Trends in Molecular Medicine,22,254-265.
2. Cheung, C. L.,Saber, N. R.(2016).Application of 3D printing in medical simulation and education.Bioengineering for Surgery,33,151-166.
3. Hu, M. H.,Chang, C. M.,Chang, T. C.,Yang, Y. T.,Chien, C. H.,Ao, W.,Lai, F. M.(2021).Fatigue tests and fracture Behavior analysis of porous implant materials fabricated by 3D metal printing technology.Sensors and Materials,33,2397-2404.
4. Kim, M.,Oh, S. K.,Choi., I.,Seo, D. K.,Roh, S. W.,Jeon, S. R.(2019).Clinical outcomes of posterior thoracic cage interbody fusion (PTCIF) to treat trauma and degenerative disease of the thoracic and thoracolumbar junctional spine.Journal of Clinical Neuroscience,60,117-123.
5. Lee, Y. H.,Chung., C. J.,Wang., C. W.,Peng, Y. T.,Chang, C. H.,Chen, C. H.,Chen, Y. N.(2016).Computational comparison of three posterior lumbar interbody fusion techniques by using porous titanium interbody cages with 50% porosity.Computers in Biology and Medicine,71,35-45.
6. Peck, J. H.,Kavlock, K. D.,Showalter, B. L.,Ferrell, B. M.,Peck, D. G.,Dmitriev, A. E.(2018).Mechanical performance of lumbar intervertebral body fusion devices: an analysis of data submitted to the food and drug administration.Journal of biomechanics,78,87-93.
7. Santos, P. F,Niinomi, M.(2015).Microstructures, mechanical properties and cytotoxicity of low cost beta Ti–Mn alloys for biomedical applications.Acta Biomaterialia,26,366-376.
8. Suh, P. B.,Lewis, C.,Puttlitz, C.,Mcgilvray, K. C.(2015).The influence of vertebral endplate density, cage contact area and cage modulus on the incidence of interbody cage subsidence.The Spine Journal,67,178.
9. Yu, Y.,Li, W.,Yu, L.,Qu, H.,Niu, T.,Zhao, Y.(2020).Population-based design and 3D finite element analysis of transforaminal thoracic interbody fusion cages.Journal of Orthopaedic Translation,21,35-40.
10. 莊永傑(2014)。臺東大學綠色科技產業碩士專班。
11. 許培峰(2008)。國立交通大學機械工程學系。