Investigation of strontium-doped biological coatings on Ti-15Zr alloys for dental implants

•Ti-15Zr alloy is subjected to abrasive blast acid etching hydrothermal treatment.•The elastic modulus of SLA and SLA-Sr were close to human bone tissue.•The higher the concentration of Sr, the faster the Sr ions are released.•With the increase of Sr content, the cell proliferation effect was more obvious. The Ti-15Zr alloy was used as the substrate in this study, which was modified by sandblast acid-etching (SLA), and the Sr ions were loaded onto the surface of the SLA by using the hydrothermal method (SLA-Sr). The results showed that the Sr ions were attached to the surface of the material in the form of granular SrTiO3. The modulus of elasticity of SLA and SLA-Sr is closer to that of human bone tissue. The higher the concentration of Sr, the greater the corrosion resistance. The SLA and SLA-Sr had superior hydrophilic and hemolytic properties than Ti-15Zr, and the higher the Sr concentration the better the cell proliferation effect.