Additive manufacturing technology has been developed in Xi＇ an Jiaotong University for almost 20 years. Up to now~ it is still attracting the attentions of the researchers or manufacturers all over the world. Some in...Additive manufacturing technology has been developed in Xi＇ an Jiaotong University for almost 20 years. Up to now~ it is still attracting the attentions of the researchers or manufacturers all over the world. Some in- novative processes and frontier application research are all being conducted here to catch up with the new develop- ment of this technology. In the paper, newly developed processes, such as ultraviolet-light emitting diode （UV- LED） stereolithography, ceramic stereolithography, and direct metal forming, were described. Some results of the frontier application researches, such as indirect fabrication of ceramic casting mould, wind-tunnel-testing models, photonic crystals and metamatcrials, were also briefly reviewed.展开更多
目的针对传统颈椎融合器与患者解剖形貌匹配程度较低的临床问题,建立一款具备高度调节功能且外形与椎体相匹配的颈椎融合器,并对其生物力学性能进行评价。方法按照颈椎前路解压术(anterior cervical discectomy and fusion,ACDF)建立颈...目的针对传统颈椎融合器与患者解剖形貌匹配程度较低的临床问题,建立一款具备高度调节功能且外形与椎体相匹配的颈椎融合器,并对其生物力学性能进行评价。方法按照颈椎前路解压术(anterior cervical discectomy and fusion,ACDF)建立颈椎C4~5节段融合模型,模拟前屈、后伸、左右侧弯、左右旋转不同运动工况,计算融合器与椎体终板的应力。3D打印制备融合器后进行体外力学实验,探究融合器的安全性与稳定性。结果该融合器可保持融合C4~5节段颈椎活动度(range of motion,ROM)为1°~2.8°,降低至自然节段ROM的40%~80%。在体外压缩试验中,融合器屈服载荷为(2721.67±209)N,满足服役状态下生理载荷的最大需求。结论所设计的高度可调融合器显示出较优的生物力学性能,且可以减少手术中的选型步骤。展开更多
目的探究3D打印多孔结构陶瓷材料外科植入物孔隙结构的宏微观特征分析及评价方法。方法基于微米X射线CT(Micro-CT)扫描获取的多孔样品图像数据,利用VG Studio MAX 3.0软件及Mimics 16.0软件的多孔结构分析功能,对多孔结构的宏观结构特...目的探究3D打印多孔结构陶瓷材料外科植入物孔隙结构的宏微观特征分析及评价方法。方法基于微米X射线CT(Micro-CT)扫描获取的多孔样品图像数据,利用VG Studio MAX 3.0软件及Mimics 16.0软件的多孔结构分析功能,对多孔结构的宏观结构特征包括总孔隙率、宏孔孔径、内连接、开/闭孔率等进行测量和分析;同时,采用扫描电子显微镜对样品表面微观多孔形貌进行特征分析和评价。结果基于Micro-CT和SEM扫描及影像学分析实现了针对3D打印多孔结构陶瓷样件的孔隙结构的宏微观特征表征和统计分析,并验证了其可行性和准确性,形成了一套面向3D打印多孔结构陶瓷材料外科植入物形貌宏微结构尺寸特征的有效的测量和评价方法。结论本文提出的基于Micro-CT和SEM扫描成像进行3D打印多孔结构陶瓷样件的孔隙结构的宏微观特征表征和分析的统计方法,有利于实现多孔结构宏微观特征的相关测试内容和试验过程的规范统一,确保测试过程方法有据可依,结果评价准确有效,有利于提升产品的加工精度,便于不同企业同种工艺制造的多孔结构特征参数之间等同比较,为医疗器械行业多孔结构宏微观特征的数据积累奠定基础,有利于提高与人体生命安全息息相关的外科植入物产品的研发和制造水平。展开更多
文摘Additive manufacturing technology has been developed in Xi＇ an Jiaotong University for almost 20 years. Up to now~ it is still attracting the attentions of the researchers or manufacturers all over the world. Some in- novative processes and frontier application research are all being conducted here to catch up with the new develop- ment of this technology. In the paper, newly developed processes, such as ultraviolet-light emitting diode （UV- LED） stereolithography, ceramic stereolithography, and direct metal forming, were described. Some results of the frontier application researches, such as indirect fabrication of ceramic casting mould, wind-tunnel-testing models, photonic crystals and metamatcrials, were also briefly reviewed.
文摘目的针对传统颈椎融合器与患者解剖形貌匹配程度较低的临床问题,建立一款具备高度调节功能且外形与椎体相匹配的颈椎融合器,并对其生物力学性能进行评价。方法按照颈椎前路解压术(anterior cervical discectomy and fusion,ACDF)建立颈椎C4~5节段融合模型,模拟前屈、后伸、左右侧弯、左右旋转不同运动工况,计算融合器与椎体终板的应力。3D打印制备融合器后进行体外力学实验,探究融合器的安全性与稳定性。结果该融合器可保持融合C4~5节段颈椎活动度(range of motion,ROM)为1°~2.8°,降低至自然节段ROM的40%~80%。在体外压缩试验中,融合器屈服载荷为(2721.67±209)N,满足服役状态下生理载荷的最大需求。结论所设计的高度可调融合器显示出较优的生物力学性能,且可以减少手术中的选型步骤。
文摘目的探究3D打印多孔结构陶瓷材料外科植入物孔隙结构的宏微观特征分析及评价方法。方法基于微米X射线CT(Micro-CT)扫描获取的多孔样品图像数据,利用VG Studio MAX 3.0软件及Mimics 16.0软件的多孔结构分析功能,对多孔结构的宏观结构特征包括总孔隙率、宏孔孔径、内连接、开/闭孔率等进行测量和分析;同时,采用扫描电子显微镜对样品表面微观多孔形貌进行特征分析和评价。结果基于Micro-CT和SEM扫描及影像学分析实现了针对3D打印多孔结构陶瓷样件的孔隙结构的宏微观特征表征和统计分析,并验证了其可行性和准确性,形成了一套面向3D打印多孔结构陶瓷材料外科植入物形貌宏微结构尺寸特征的有效的测量和评价方法。结论本文提出的基于Micro-CT和SEM扫描成像进行3D打印多孔结构陶瓷样件的孔隙结构的宏微观特征表征和分析的统计方法,有利于实现多孔结构宏微观特征的相关测试内容和试验过程的规范统一,确保测试过程方法有据可依,结果评价准确有效,有利于提升产品的加工精度,便于不同企业同种工艺制造的多孔结构特征参数之间等同比较,为医疗器械行业多孔结构宏微观特征的数据积累奠定基础,有利于提高与人体生命安全息息相关的外科植入物产品的研发和制造水平。
