Calcium phosphate coatings prepared by electrocrystallization from aqueous electrolytes

Abstract

The concept of biological fixation of artificial joint prosthesis by using bioactive calcium phosphate coatings has generated considerable interest in recent decades. This paper reports an electrochemical route for fabricating hydroxyapatite (HA), carbonated-HA and fluoridated-HA coatings on porous and non-porous substrates at relatively low temperatures, using aqueous electrolytes. Scanning electron microscopy (SEM), X-ray diffraction (XRD) and infrared spectroscopy (IR) were used to characterize the morphology, structure and chemical composition of the coatings. The results suggest that the electrochemical route for the fabrication of bioactive calcium phosphate coatings may offer significant advantages over the currently used methods.

Osteoinductivity of HAp Films with Different Surface Morphologies Coated by the Thermal Substrate Method in Aqueous Solutions

“…We have proposed a new hydro-coating method for calcium phosphate, a thermal substrate method that overcomes several weak points in the traditional hydroprocesses. 2) In other papers on hydroprocessing, [3][4][5][6][7][8][9][10] several factors in the solution affecting the HAp coating have been extensively examined, such as the solute concentration, the pH, the type of ion, its concentration, and additives. We have already reported that HAp coating of substrates by the thermal substrate method is experimentally feasible, and confirmed experimentally that the ion source, the Ca/P molar ratio in the solution, and the surface roughness and topography of the substrate affected the precipitate.…”

Preparation of Calcium Phosphate Coatings on Titanium Using the Thermal Substrate Method and Their <I>in vitro</I> Evaluation

“…2) Experimental results of the coatings of HAp on substrates have already been reported. 2) In the papers on hydro-process, [3][4][5][6][7][8][9][10] several factors affecting the HAp coating have been extensively examined, such as the solute concentration, the pH, ion concentration, and additives. We have already confirmed experimentally that the ion source, the molar ratio Ca/P, the temperature, and the surface roughness of the substrate have an effect on the type and the amount of precipitate produced, and on the surface morphology.…”

Advances in Biomimetic Apatite Coating on Metal Implants

“…Chen et al, 1998;Shirkhanzadeh, 1995), electrophoretic deposition (Zhitomirsky & Gal-Or, 1997)and anodic oxidation(micro-arc oxidation) (Lausmaa, 2001; X.Y. Liu et al, 2004), are based on different chemical reactions occurring at an electrically energized surface (electrode) placed in an electrolyte.…”