关键词： 瓷贴面   美学修复   数字化   3D打印   备牙导板  

摘要： 目的:探讨数字化引导前牙瓷贴面修复的短期临床效果。方法:纳入2020年3月~2021年3月接诊的17例(80颗牙)数字化引导前牙瓷贴面修复患者,Bland-Altman方法评价微创组(9例,40颗牙)与有创组(8例,40颗牙)备牙导板准确度,分别比较术后1周和3、6、12个月临床效果,及术后12个月的牙周情况。结果:导板引导的微创组与有创组牙体预备误差均数为(0.089±0.029)mm,且颈部和中部误差较切端小。有创组颜色匹配评分较高(P<0.05),微创组牙龈健康和术后敏感评分较高(P<0.05)。术后12个月微创组菌斑指数0.67±0.41,有创组0.88±0.47(P=0.026)。结论:数字化引导瓷贴面修复实现牙体预备可视化,且短期临床效果良好。

关键词： 3D打印   紫外辅助墨水直写   导电银浆   柔性应变传感器   图案化功能层  

摘要： 以光固化硅树脂(Si-350)为低聚物、丙烯酸异冰片酯(IBOA)为单体、气相二氧化硅纳米颗粒(A200)为流变改性剂、片状银粉为导电填料,设计了可打印硅树脂为基底层、导电银浆为功能层,利用紫外光(UV)辅助墨水直写实现柔性基底层和图案化功能层的连续打印,制备一体化电阻式柔性应变传感器。利用旋转流变仪对基底层和功能层墨水的流变性能进行测试,用四探针对功能层的导电性进行测试,用万能试验机和万用表对传感器的力学性能和传感性能进行表征与测试。结果表明,树脂Si-350与单体IBOA质量比为2.5∶1,A200添加量(m(A200)/(m(Si-350)+m(IBOA)))为9%的基底层具有最佳的力学性能。功能层中银的质量分数为70%、线条尺寸为0.30 mm的传感器表现出优异的灵敏度和力学性能,能承受180%以上的应变。进一步对功能层线形进行优化设计,曲线形结构的传感器综合性能最佳,具备抗扭转和弯曲能力,可实现对人体运动的实时监测,展现出在柔性可穿戴电子设备领域的广阔应用前景。

关键词： 3D printing   Bioprinting   Tissue engineering   Regenerative medicine  

摘要： As surgical procedures transition from conventional resection to advanced tissue-regeneration technologies,human disease therapy has witnessed a great leap *** particular,three-dimensional(3D)bioprinting stands as a landmark in this setting,by promising the precise integration of biomaterials,cells,and bioactive molecules,thus opening up a novel avenue for tissue/organ *** by the editorial board of Bio-Design and Manufacturing,this review brings together a cohort of leading young scientists in China to dissect the core functionalities and evolutionary trajectory of 3D bioprinting,by elucidating the intricate challenges encountered in the manufacturing of transplantable *** further delve into the translational pathway from scientific research to clinical application,emphasizing the imperativeness of establishing a regulatory framework and rigorously enforcing quality-control ***,this review outlines the strategic landscape and innovative achievements of China in this field and provides a comprehensive roadmap for researchers worldwide to propel this field collectively to even greater heights.

关键词： 弹性体材料   增材制造   床垫   ELA   消费级   BIO   打印   生物基  

摘要： 2025年3月17~19日,亚太地区增材制造行业旗舰展——TCT亚洲展即将在国家会展中心(上海)盛大启幕!博理科技将会在本届TCT展会上全球首发一款基于高分子超高速3D打印技术打印的床垫,尺寸达2 m(长)×1.8 m(宽)×0.2 m(高)。据悉,这款创新产品采用生物基弹性体材料ELASTO 1000 BIO打印,将重新定义睡眠体验,意味着弹性体3D打印技术在消费级市场的新突破。

关键词： 3D打印   机械   应用   挑战  

摘要： 当前,3D打印技术在机械制造领域引发了深刻变革。在机械制造行业,3D打印技术具有显著的优势,有利于快速响应市场变化、缩短产品开发周期,并降低生产成本。同时,3D打印技术也能实现复杂结构件的直接制造,提高材料利用率,对于优化机械设备性能和降低能耗具有重要意义。尽管3D打印技术在机械制造中展现出了巨大潜力,但仍面临着技术、市场、法律与政策,以及教育与培训等方面的多重挑战。结合3D打印技术在机械制造中的应用发展现状,将其拓展到其他领域,以期提升3D打印技术的应用新意。

关键词： 3D printing   dental ceramics   lithium disilicate   slurry proportion   stereo lithography apparatus  

摘要： Objective This study aims to use 3D printing technology based on the principle of stereo lithography apparatus (SLA) to shape dental lithium disilicate ceramics and study the effects of different slurry proportions on the microstructure and properties of heat-treated samples. Methods The experimental group comprised lithium disilicate ceramics manufactured through SLA 3D printing, and the control group comprised lithium disilicate ceramics (IPS *** CAD) fabricated through commercial milling. An array of different particle sizes of lithium disilicate ceramic powder materials (nano and micron) was selected for mixing with photocurable acrylate resin. The proportion of experimental raw materials was adjusted to prepare five groups of ceramic slurries for 3D printing (Groups S1-S5) on the basis of rheological properties, stability, and other factors. Printing, debonding, and sintering were conducted on the experimental group with the optimal ratio, followed by measurements of microstructure, crystallographic information, shrinkage, and mechanical properties. Results Five groups of lithium disilicate ceramic slurries were prepared, of which two groups with high solid content (75%) (Groups S2 and S3) were selected for 3D printing. X-ray diffraction and scanning electron microscopy results showed that lithium disilicate was the main crystalline phase in Groups S2 and S3, and its microstructure was slender, uniform, and compact. The average grain sizes of Groups S2 and S3 were (559.79±84.58) nm and (388.26±61.49) nm, respectively (P<0.05). Energy spectroscopy revealed that the samples in the two groups contained a high proportion of Si and O elements. After heat treatment, the shrinkage rate of the two groups of ceramic samples was 18.00%-20.71%. Test results revealed no statistical difference in all mechanical properties between Groups S2 and S3 (P>0.05). The flexural strengths of Groups S2 and S3 were (231.79±21.71) MPa and (214.86±46.64) MPa, respectively, which were l

关键词： 3D print   monument   sculpture   纪念碑   雕塑   3D打印   monumento   escultura   impresión 3D