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Abstract <p>Monophasic (brushite) and composite (brushite-calcite-apatite) coatings were obtained on titanium by cathodic electrodeposition from nitrate (pH 4) and carbonate (pH 5) electrolytes. The biomimetic formation of an apatite layer on the samples soaked in standard and concentrated (×3) simulated body fluid (SBF) was investigated. It was found that in SBF after 2–4 weeks, brushite transforms into amorphous apatite. Using SBF ×3 accelerates this process to 1–7 days at 37°C. Thermal treatment at 800°C led to the crystallization of the amorphous phase. Coatings deposited from the nitrate electrolyte formed a mixture of β‑tricalcium phosphate and hydroxyapatite, while those from the carbonate electrolyte formed predominantly hydroxyapatite up to 10% of calcium oxide. The composite coatings exhibit enhanced bioactivity and open prospects for creating implants with osteoconduction and resorption properties.</p>

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The Influence of Electrolyte Composition and Model Solution on the Apatite-Forming Ability and Crystallization of Calcium Phosphate Coatings on Titanium

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • A. E. Doroshenko,
  • V. K. Krut’ko,
  • O. N. Musskaya,
  • A. I. Kulak

摘要

Abstract

Monophasic (brushite) and composite (brushite-calcite-apatite) coatings were obtained on titanium by cathodic electrodeposition from nitrate (pH 4) and carbonate (pH 5) electrolytes. The biomimetic formation of an apatite layer on the samples soaked in standard and concentrated (×3) simulated body fluid (SBF) was investigated. It was found that in SBF after 2–4 weeks, brushite transforms into amorphous apatite. Using SBF ×3 accelerates this process to 1–7 days at 37°C. Thermal treatment at 800°C led to the crystallization of the amorphous phase. Coatings deposited from the nitrate electrolyte formed a mixture of β‑tricalcium phosphate and hydroxyapatite, while those from the carbonate electrolyte formed predominantly hydroxyapatite up to 10% of calcium oxide. The composite coatings exhibit enhanced bioactivity and open prospects for creating implants with osteoconduction and resorption properties.