A review in titanium-zirconium binary alloy for use in dental implants: Is there an ideal Ti-Zr composing ratio?

• Published in: The Japanese dental science review Vol. 59; pp. 28 - 37
• Main Authors: Zhao, Qian, Ueno, Takeshi, Wakabayashi, Noriyuki
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier Ltd 01.12.2023; Elsevier
• Subjects: Composition ratio; Dental implant; Material properties; Microstructure; Phase composition; Ti-Zr alloy; Phase composition; Microstructure; Ti-Zr alloy; Dental implant; Composition ratio; Material properties
• ISSN: 1882-7616; 2213-6851; 2213-6851
• DOI: 10.1016/j.jdsr.2023.01.002

Binary titanium-zirconium alloys have been studied as promising alternatives for Ti implants. The commercial Ti-15Zr alloy (Roxolid, Straumann) has been the major subject of numerous binary Ti-Zr alloys-related studies and has gained wide recognition in laboratory studies and clinical practices. However, binary Ti-Zr alloys of other composition ratios are still being investigated by researchers. This review aims to provide information on the potential of binary Ti-Zr alloys other than Ti-15Zr as implant materials in terms of mechanical strengths, chemical or electrochemical corrosion resistance capabilities, and biological performances. In addition, in this review, the Ti-15Zr alloy is discussed only when compared with other binary Ti-Zr alloys. From the included 26 studies, it is confirmed that the mechanical, chemical, electrochemical, and biological properties of Ti-Zr alloys are related to the Ti and Zr composition ratio in the alloy, phase, manufacturing process, and surface treatment. Among the studied alloys, α-or α′ phase-Ti-5 wt, 45 wt/30at, and 50 wt. %Zr exhibited relatively more promising results for further investigation. More research is necessary to evaluate the potential for future use of these materials for implants.