title: Corrosion behavior of novel Ti-24Nb-4Zr-7.9Sn alloy for dental implant applications in vitro.
abstract: Ti-24Nb-4Zr-7.9Sn (TNZS) alloy is a newly developed β-titanium alloy considered suitable for dental implant applications due to its low elastic modulus and high strength. The aim of this study was to investigate the corrosion behavior of TNZS alloy through a static immersion test in various simulated physiological solutions, namely, artificial saliva, lactic acid solution, fluoridated saliva, and fluoridated acidified saliva for 7 days. The corrosion behavior of commercially pure titanium and Ti-6Al-4V alloy were also examined for comparison. The elemental release was measured with inductively coupled plasma mass spectroscopy, and the changes of alloy surface were observed with scanning electron microscopy (SEM). The test results showed that the quantity of each metal element released from TNZS alloy into fluoridated solutions was much higher than the solutions without fluoride ions. It was highest in fluoridated acidified saliva and lowest in artificial saliva (p < 0.01). The total elemental release from TNZS alloy was lower than commercially pure titanium and Ti-6Al-4V alloy in the same solution (p < 0.01). SEM micrographs indicated that TNZS alloy possessed better corrosion resistant performance. It can be concluded that fluoridated solutions have a negative influence on the corrosion behavior of TNZS alloy. Compared with commercially pure titanium and Ti-6Al-4V alloy, TNZS alloy demonstrates better corrosion resistance in various simulated physiological solutions, so it has greater potential for dental implant applications.
authors.affiliation: Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an 710032, China.
authors.forename: Yicheng
authors.initials: Y
authors.lastname: Cheng
authors.forename: Jiang
authors.initials: J
authors.lastname: Hu
authors.forename: Chunbao
authors.initials: C
authors.lastname: Zhang
authors.forename: Zhongyi
authors.initials: Z
authors.lastname: Wang
authors.forename: Yulin
authors.initials: Y
authors.lastname: Hao
authors.forename: Bo
authors.initials: B
authors.lastname: Gao
mesh_terms: D000497:Alloys / Q000737:chemistry; D003343:Corrosion; D015921:Dental Implants; D005457:Fluoridation; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D012464:Saliva, Artificial / Q000737:chemistry; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry
chemical_list: D000497:Alloys; D015921:Dental Implants; D012464:Saliva, Artificial; C548656:Ti-24Nb-4Zr-7.9Sn alloy; C031462:titanium alloy (TiAl6V4); D014025:Titanium