Osak Patrycja, Maszybrocka Joanna, Zubko Maciej, Rak Jan, Bogunia Sylwia, Łosiewicz Bożena
Faculty of Science and Technology, Institute of Materials Engineering, University of Silesia in Katowice, 75 Pułku Piechoty 1A, 41-500 Chorzów, Poland.
Old Machar Medical Practice, 526-528 King Street, Aberdeen AB24 5RS, UK.
Materials (Basel). 2021 Dec 8;14(24):7536. doi: 10.3390/ma14247536.
Titanium Grade 4 (Ti G4) is widely used in medicine for dental implants. The failure-free life of implants depends on their properties such as resistance to wear and friction processes. This paper presents an analysis of the influence of sandblasting on tribological wear of commercial dental implants made of TiG4 in artificial saliva. Tribological wear measurements were performed in a reciprocating motion in the ball-on-disc system. The scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS) method was used to characterize the surface of the implants before and after the tribological wear test. The microhardness of Ti G4 was measured before and after sandblasting by the Vickers method. The contact angle was determined by the method of sitting drop in air. The residual stress test using the X-Ray Diffraction (XRD) single-{hkl} sinψ method was carried out. The compressive residual stress of 324(7) MPa and surface hardening of Ti G4 was revealed after sandblasting with AlO particles of 53-75 μm in diameter. It was found that sandblasting changes the surface wettability of Ti G4. The intermediate wettability of the mechanically polished surface and the hydrophobicity of the sandblasted surface was revealed. Sandblasting reduces the tribological wear and friction coefficient of Ti G4 surface in saliva. The three-body abrasion wear mechanism was proposed to explain the tribological wear of Ti G4 in saliva.
4级钛（Ti G4）在医学领域广泛用于牙科植入物。植入物的无故障使用寿命取决于其性能，如抗磨损和摩擦过程的能力。本文分析了喷砂处理对由TiG4制成的商用牙科植入物在人工唾液中的摩擦磨损的影响。摩擦磨损测量在球盘系统中以往复运动进行。采用扫描电子显微镜/能量色散X射线光谱法（SEM/EDS）对摩擦磨损试验前后植入物的表面进行表征。采用维氏法测量了喷砂处理前后Ti G4的显微硬度。通过悬滴法在空气中测定接触角。采用X射线衍射（XRD）单{hkl}sinψ法进行残余应力测试。用直径为53 - 75μm的AlO颗粒喷砂处理后，Ti G4显示出324(7)MPa的压缩残余应力和表面硬化。发现喷砂处理改变了Ti G4的表面润湿性。揭示了机械抛光表面的中等润湿性和喷砂处理表面的疏水性。喷砂处理降低了Ti G4表面在唾液中的摩擦磨损和摩擦系数。提出三体磨料磨损机制来解释Ti G4在唾液中的摩擦磨损。
