颈椎融合器的力学测试及有限元验证
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摘要
目的:设计一款聚乳酸材质融合器,完成力学测试并判定融合器的可行性.方法:分别对健康的和植入融合器的C5-C6节段羊颈椎进行压缩、前屈、后伸、侧弯实验,得出载荷-位移曲线,比较融合器植入前后颈椎的力学性能;再用万能电子试验机检验融合器的疲劳强度;最后对融合器进行有限元仿真观察应力分布.结果:加入融合器后颈椎的稳定性有所提高;融合器的疲劳强度合格,应力分布合理,未产生应力集中.结论:聚乳酸材质融合器有足够的力学强度,满足力学要求.
Aim:to design a fusion cage made of polylactic acid material and determine the design feasibility by biomechanical test. Method:During compression,flexion,extension and lateral bending experiment on fit sheep cervical vertebra and segments C5-C6 implanted fusion cage,reached load-displacement curve,compared the mechanical properties;Inspected fatigue strength of the fusion cage by universal testing machine;Observed pressure stress of fusion cage via finite element software. Result:The cervical vertebra became more stable after implanted fusion cage;the fatigue strength of the fusion cage came up to standard,pressure stress of fusion cage distributed appropriately and didn't come into pressure stress concentration. Conclusion:The fusion cage made of polylactic acid material has enough mechanic strength.
Aim:to design a fusion cage made of polylactic acid material and determine the design feasibility by biomechanical test. Method:During compression,flexion,extension and lateral bending experiment on fit sheep cervical vertebra and segments C5-C6 implanted fusion cage,reached load-displacement curve,compared the mechanical properties;Inspected fatigue strength of the fusion cage by universal testing machine;Observed pressure stress of fusion cage via finite element software. Result:The cervical vertebra became more stable after implanted fusion cage;the fatigue strength of the fusion cage came up to standard,pressure stress of fusion cage distributed appropriately and didn't come into pressure stress concentration. Conclusion:The fusion cage made of polylactic acid material has enough mechanic strength.
引文
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[11]王晨曦,赵改平,柏磊磊,等.动态稳定器植入术后颈椎生物力学的有限元分析[J].生物医学工程学杂志,2016,33(4):647-650.
[12]张勇,朱悦,郝玉琳,等.一种新型人工颈椎间盘的生物力学研究[J].中国医科大学学报,2014,43(4):351-373.
[13]王志勇,余化龙,何宁,等.颈椎人工间盘植入与融合固定后生物力学有限元比较分析[J].骨科,2014,5(1):17-18.
[2]马金梁.部分可吸收椎间融合器的研制及实验研究[D].重庆:重庆大学,2012.
[3]李奇志.颈椎植入物的生物力学分析及临床运用[J].中国组织工程研究与临床康复,2007,11(38):7662-7664.
[4]王甲甲.人体颈椎有限元建模及仿生颈椎椎间融合器研究[D].长春:吉林大学,2014.
[5]吴学建,皮国富,王利民,等.高分子聚乙烯颈椎融合器的生物力学特性研究[J].中华实验外科杂志,2004,21(7):860-862.
[6]杨接来,徐俊,谷辉杰,等.3D打印聚乳酸/纳米级β-磷酸钙可吸收山羊颈椎融合器的生物相容性及生物力学评价[J].中国临床医学,2017,24(4):525-530.
[7]Andrew J,AlexanderJ.Biomechanicalcomparion of posterior lumbar interbody fusion cage[J].Spine,1997,22:2375-9.
[8]罗名,孟祥杰,马洪顺.T1~T6胸椎压缩实验研究[J].试验技术与试验机,2001,41(1、2):70-73.
[9]王溪原,杨有康,马洪顺,等.氮化纯钛颈椎植骨融合器的研制及生物力学测试[J].中国临床康复,2003,7(2):211-213.
[10]姜宏,施杞,王已进,等.颈椎失稳临界值和极限强度的测量[J].医用生物力学,1997,12(4):224-226.
[11]王晨曦,赵改平,柏磊磊,等.动态稳定器植入术后颈椎生物力学的有限元分析[J].生物医学工程学杂志,2016,33(4):647-650.
[12]张勇,朱悦,郝玉琳,等.一种新型人工颈椎间盘的生物力学研究[J].中国医科大学学报,2014,43(4):351-373.
[13]王志勇,余化龙,何宁,等.颈椎人工间盘植入与融合固定后生物力学有限元比较分析[J].骨科,2014,5(1):17-18.