Process for producing a gradient coating made of calcium phosphate phases and metal oxide phase on metallic implants
First Claim
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1. A process for producing a gradient coating of calcium phosphate phases and metal oxide phases on a metal implant, comprising:
- providing a metal implant;
providing an electrolyte solution containing calcium phosphate ions, and having a pH of between 4.0 and 7.5;
providing a counter electrode in the electrolyte solution;
placing the implant in the electrolyte solution;
applying an electrical potential between the counter electrode and the implant, so that the implant initially acts as a substrate cathode;
periodically reversing the polarity of the electrical potential a plurality of times, so that the implant alternates between cathodic polarization and anodic polarization, to deposit a gradient coating of calcium phosphate phases and metal oxide phases on the implant.
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Abstract
The invention concerns a process for producing a gradient coating of calcium phosphat phases and metal oxide phases on metallic implants, in particular made of titanium or titanium alloys, for use as dental, jaw or joint implants. A solution containing calcium ions and phosphate ions is used as electrolyte of which the pH is slightly acidic to approximately neutral. The substrate electrodes are alternately polarized cathodically and anodically. The layer deposited in a gratuated manner is adherent, has a fine structure and is distinguished by a high degree of biocompatibility.
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9 Claims
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1. A process for producing a gradient coating of calcium phosphate phases and metal oxide phases on a metal implant, comprising:
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providing a metal implant; providing an electrolyte solution containing calcium phosphate ions, and having a pH of between 4.0 and 7.5; providing a counter electrode in the electrolyte solution; placing the implant in the electrolyte solution; applying an electrical potential between the counter electrode and the implant, so that the implant initially acts as a substrate cathode; periodically reversing the polarity of the electrical potential a plurality of times, so that the implant alternates between cathodic polarization and anodic polarization, to deposit a gradient coating of calcium phosphate phases and metal oxide phases on the implant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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