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| WANG Di,WEI Lei,LEI Wei.Design and biomechanical evaluation of a novel connective rod for revision surgery[J].Chinese Journal of Spine and Spinal Cord,2017,(11):1019-1023. |
| Design and biomechanical evaluation of a novel connective rod for revision surgery |
| Received:July 20, 2017 Revised:October 22, 2017 |
| English Keywords:Reoperation Model validation Spinal fusion Biomechanics |
| Fund:国家自然科学基金资助项目（81301535），陕西省重点研发计划（2017SF-024） |
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| English Abstract: |
| 【Abstract】 Objectives: To design a novel connective rod for revision surgery by using an end to end connection joint, and to evaluate their biomechanical characters. Methods: Following the guidelines of American society for testing and materials(ASTM), static compression bending test, static tension bending test, fatigue test was employed on both conventional rod(group A, n=6) and connective rod for revision surgery(group B, n=6) to measure the bending yield load, bending stiffness and maximum run-out load, and to determine the biomechanical stability of novel connective rod. Results: In static compression bending test, compressive bending yield load and compressive bending stiffness of group A were 865.60±25.71N and 52.35±0.38N/mm respectively; while they were 863.20±11.01N and 52.92±2.43N/mm in group B, the differences between groups had no statistical significance. In static tension bending test, tensile bending yield load and tensile bending stiffness of group A were 1184.20±30.14N and 58.89±3.01N/mm respectively; and for group B, they were 1169.20±14.89N and 57.48±1.47N/mm respectively, the differences between groups had no statistical significance. In fatigue test, the maximum run-out load of group A and group B was 303N and 302N respectively, the difference between groups had no statistical significance. Conclusions: Compared with the conventional connective rod, the novel connective rod for revision surgery has a similar bending yield load, bending stiffness and maximum run-out load. |
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