Niobium in restorative dentistry

The application of metal dental restorations in oral prosthetics has become very widespread and popular. Due to the complexity of the intraoral environment, it has been the focus of research to improve the mechanical and chemical properties, especially the corrosion resistance, to increase the durability of restorations under the premise of ensuring the good biocompatibility of the materials.Haoka et al. tested the electrochemical properties of niobium-containing magnetic attachments, and the results showed that compared with the traditional magnetic attachments, the magnetic attachments made of Pt-30.0mass%Fe-0.6mass%Nb alloys had better corrosion resistance.Lee et al. tested the electrochemical properties of titanium-niobium alloys. Lee et al. tested the structural properties of titanium-niobium alloys and showed that Ti-10Nb and Ti-27.5Nb alloys had the highest strength, while Ot' phase-dominated (17.5Nb, 20Nb) alloys and B-phase-dominated alloys (>30Nb) had the lowest modulus of elasticity. . In addition, all titanium-niobium alloys involved in the tests showed excellent corrosion resistance.

Kikuchi et al. tested the mechanical properties of cast titanium-niobium alloys containing different specific gravity of niobium, and the results showed that the hardness of titanium alloys containing 5 wt% niobium has been significantly enhanced; titanium alloys containing 10 wt% niobium and above showed significantly enhanced yield and tensile strengths, while elongation decreased significantly; titanium alloys containing 30 wt% niobium showed better abrasive properties while maintaining a higher hardness, strength, and modulus of elasticity . The study by Hu Xin et al. also confirmed that the high-strength, high modulus of elasticity titanium-zirconium-niobium-tin alloy is a metal material with good biosafety for oral restorations, but the wear mechanism changes from abrasive wear to adhesive wear with the increase of surface load.