The modification of polytetrafluoroethylene surface using hydroxyapatite coating deposited by RF-magnetron method

The ossteointegration rate of the polytetrafluoroethylene (PTFE) dental implants is related to their composition and properties of surface. Osteoconductive calcium phosphate coatings promote bone healing and apposition, leading to the rapid biological fixation of implants. The deposition of the hydroxyapatite (HA) coating on the PTFE surface by the RF magnetron sputtering method and the influence of this modification on the wettability, and physicochemical properties are presented in the present work

Formation and Characterization of Crystalline Hydroxyapatite Coating with the (002) Texture

This study reports the effect of titanium (Ti) microstructure on the mechanical properties and surface wettability of thin (<800 nm) hydroxyapatite (HA) coating deposited via radio-frequency (RF) magnetron sputtering. It was revealed that the sand-blasting (SB) and acid etching (AE) of Ti prior deposition led to a wide range of surface roughness in nano/micro scale. After nanostructured HA coating deposition such physico-mechanical characteristics as nanohardness H, Young's modulus E, H/E ratio and H[3]/E[2] were significantly improved. Moreover, HA coatings exhibited improved wear resistance, lower friction coefficient and ability of the coating to wetting

Stydying of morphology and elemental composition of the calcium phosphate layer after treatment by impulse electron beam

One of the effective ways to improve the adhesive properties of biocompatible coatings on implants is using electron-beam melting of the surface, accompanied by a partial or complete mixing area "coating- substrate". The surface of the titanium substrate bearing calcium phosphate coating received by RF magnetron sputter is processed by a pulsed electron beam having an energy density of 0.8 - 8 J/cm2. After treatment by a pulsed electron beam under different regimes significant changes in the topography of the formed surface were observed. Treatment regimes with an energy density of 0.8 J/cm{2} and 3 lead to the thermal annealing of the coating. The use of a beam having an energy density of 8 and 6.5 J/cm{2} leads to partial vaporization and mixing of the coating material with a titanium matrix