Abstract
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} sin2ψ method was carried out. The compressive residual stress of 324(7) MPa and surface hardening of Ti G4 was revealed after sandblasting with Al2O3 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.
Highlights
Dental implant prosthetics is one of the most dynamically developing fields of modern medicine
53–75 μm in diameter is an effective method of modifying the surface of Titanium Grade 4 (Ti G4) used for dental implants by increasing its surface roughness, microhardness, and resistance to tribological wear in saliva
Sandblasting is one of the fastest and most economical ways to produce a rough surface, it affects the change in the wettability of the
Summary
Dental implant prosthetics is one of the most dynamically developing fields of modern medicine. Lack of teeth influences chewing disorders, speech problems, and aesthetics [1,2,3]. The solution to these problems is dental implants that supplement single teeth or provide support for permanent dentures–. Dental implants are used when the number of teeth is insufficient for the proper functioning of the oral cavity. They maintain the aesthetic effect by imitating normal teeth and prevent bone loss and avoid changes in the temporomandibular joints. The most important problem limiting the proper functioning of dental implants is wear resistance. Dental implants must be resistant to friction due to the method of application [4]
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