The Effect of the Supersonic Wave in the Hydroxyapatite Crystallization on the Bio-Active Pure Titanium in Simulated Body Fluid

Abstract

In this study, the effect of the ultrasound wave stimulation for the hydroxyapatite crystalline formation on bioactive pure titanium surface was evaluated in vitro on purpose to accelerate the bone-binding to bioactive material. Pure titanium was used as a specimen, processed in the chemical treatment and the heat treatment, and soaked in simulated body fluid (SBF) under ultrasound waving for planned time-periods. The surfaces of specimens were observed by using Scanning Electron Microscope (SEM), X-ray Diffraction etc. to assess the state of apatite deposition. In result, the SEM etc. showed that more rich and fine layer with rich calcium and phosphate compounds covered on the surface in ultrasound waving group as compared with the non-ultrasound pulse group. The measurements of mass of specimens also indicated the efficiency of ultrasound waving for apatite formation. These findings suggested that the nucleation and crystallization of apatite might be promoted by micro moving and cavitation of ultrasound waving and the ultrasound waving had clinical potential to improve the osteointegration for medical implant.