Dent Mater:纳米晶氧化锆3D打印件在牙科应用中的适用性

2020-02-14 不详 网络

本研究旨在评估通过自动铸造增材制造(AM)获得的纳米结构氧化锆片在牙科应用中的适用性。将生产的样品的密度,晶体结构,形态/孔隙率,表面粗糙度,硬度,韧性,润湿性和生物相容性与通过类似的商业氧化锆材料的常规减法制造(SM)获得的样品进行了比较。咀嚼模拟研究是针对人造唾液中的牙齿人类牙尖进行的。对材料的磨损进行了量化,并研究了磨损机理以及釉料涂层的影响。结果显示,具有生物相容性的AM样品比SM样品密度

本研究旨在评估通过自动铸造增材制造(AM)获得的纳米结构氧化锆片在牙科应用中的适用性。

将生产的样品的密度,晶体结构,形态/孔隙率,表面粗糙度,硬度,韧性,润湿性和生物相容性与通过类似的商业氧化锆材料的常规减法制造(SM)获得的样品进行了比较。咀嚼模拟研究是针对人造唾液中的牙齿人类牙尖进行的。对材料的磨损进行了量化,并研究了磨损机理以及釉料涂层的影响。

结果显示,具有生物相容性的AM样品比SM样品密度稍小,多孔性更好,与SM样品相比,硬度,韧性和润湿性更低。咀嚼测试后,在AM和SM样品上均未发现磨损。但是,当将AM样品用作配对体时,牙齿磨损显著降低。对于上釉的样品,涂层表面和牙尖都会磨损,这是因为该尖头的磨损高于未上釉的样品。与涂有SM涂层的样品相比,针对AM涂层的样品进行测试的尖头磨损较少。

总体而言,本文提出的结果表明,AM处理的纳米结构氧化锆可用于牙齿修复,从处理和摩擦学性能的角度来看,具有重要的优势。此外,在SM和AM处理的样品中都应仔细考虑釉面处理的选项。

原始出处:

Branco AC, Silva R, et al., Suitability of 3D printed pieces of nanocrystalline zirconia for dental applications. Dent Mater. 2020 Jan 27. pii: S0109-5641(20)30006-3. doi: 10.1016/j.dental.2020.01.006.

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