Microstructure and mechanical properties of Ti-15Zr alloy used as dental implant material.
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 (1-2µm), 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% (560MPa vs. 435MPa and 500MPa vs. 380MPa for machined and SLA-treated surfaces, respectively). Additional implant fatigue tests showed enhanced fatigue performance of Ti-15Zr over Ti-Grade4.
Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia. Electronic address: alexander.medvedev@monash.edu.
Alexander E
AE
Medvedev
Department of Materials Science and Engineering, Monash University, Clayton, Victoria 3800, Australia.
Andrey
A
Molotnikov
Institute for Frontier Materials, Deakin University, Geelong, Victoria 3216, Australia.
Rimma
R
Lapovok
Fraunhofer-Institut für Werkstoffmechanik IWM, 79108 Freiburg, Germany.
Rolf
R
Zeller
Institut Straumann AG, Basel, Switzerland.
Simon
S
Berner
Institut Straumann AG, Basel, Switzerland.
Philippe
P
Habersetzer
Institut Straumann AG, Basel, Switzerland.
Florian
F
Dalla Torre
D003722:Dental Alloys; D015921:Dental Implants; D008422:Materials Testing; D013499:Surface Properties; D014025:Titanium; D015040:Zirconium
D003722:Dental Alloys; D015921:Dental Implants; D015040:Zirconium; D014025:Titanium
Dental implants; Fatigue; Microstructure; SLA (Sand blasting and acid etching); Ti–Zr alloy