Strontium-Loaded Nanotubes of Ti-24Nb-4Zr-8Sn Alloys for Biomedical Implantation

J Biomed Nanotechnol. 2021 Sep 1;17(9):1812-1823. doi: 10.1166/jbn.2021.3160.

Abstract

Ti-24Nb-4Zr-8Sn (Ti2448) alloys, with a relatively low elastic modulus and unique mechanical properties, are desirable materials for oral implantation. In the current study, a multifaceted strontium-incorporating nanotube coating was fabricated on a Ti2448 alloy (Ti2-NTSr) through anodization and hydrothermal procedures. In vitro, the Ti2-NTSr specimens demonstrated better osteogenic properties and more favorable osteoimmunomodulatory abilities. Moreover, macrophages on Ti2-NTSr specimens could improve the recruitment and osteogenic differentiation of osteoblasts. In vivo, dense clots with highly branched, thin fibrins and small pores existed on the Ti2-NTSr implant in the early stage after surgery. Analysis of the deposition of Ca and P elements, hard tissue slices and the bone-implant contact rate (BIC%) of the Ti2-NTSr implants also showed superior osseointegration. Taken together, these results demonstrate that the Ti2-NTSr coating may maximize the clinical outcomes of Ti2448 alloys for implantation applications.

MeSH terms

  • Alloys
  • Nanotubes*
  • Osteogenesis
  • Strontium*
  • Surface Properties
  • Titanium

Substances

  • Alloys
  • Titanium
  • Strontium