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Microstructure and mechanical properties of Ti-15Zr alloy used as dental implant material

: Medvedev, A.E.; Molotnikov, A.; Lapovok, R.; Zeller, R.; Berner, S.; Habersetzer, P.; Dalla Torre, F.


Journal of the mechanical behavior of biomedical materials 62 (2016), S.384-398
ISSN: 1751-6161
ISSN: 1878-0180
Fraunhofer IWM ()
dental implants ; fatigue; Ti-Zr alloy; microstructure; SLA (Sand blasting and acid etching)

Ti–Zr alloys have recently started to receive a considerable amount of attention as promising materials for dental applications. This work compares mechanical properties of a new Ti–15Zr alloy to those of commercially pure titanium Grade4 in two surface conditions – machined and modified by sand-blasting and etching (SLA). As a result of significantly smaller grain size in the initial condition (1–2 µm), the strength of Ti–15Zr alloy was found to be 10–15% higher than that of Grade4 titanium without reduction in the tensile elongation or compromising the fracture toughness. The fatigue endurance limit of the alloy was increased by around 30% (560 MPa vs. 435 MPa and 500 MPa vs. 380 MPa for machined and SLA-treated surfaces, respectively). Additional implant fatigue tests showed enhanced fatigue performance of Ti–15Zr over Ti–Grade4.