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Abstract <p>This research investigates the enhancement of biocompatibility and mechanical properties of Co-Cr-Mo alloys for medical implants using hydroxyapatite (HA) and niobium pentoxide (Nb<sub>2</sub>O<sub>5</sub>) incorporated into a PMMA matrix, including a novel hybrid HA/Nb<sub>2</sub>O<sub>5</sub>-PMMA coating. Electrostatic spray deposition was employed to apply the coatings. Microstructural analyses confirmed uniform dispersion of particles, improving surface integrity. The hybrid coating exhibited the highest scratch hardness (~12&#xa0;N/mm<sup>2</sup>) and improved wettability (contact angle ~ 63°). Coated samples showed reduced ion release compared to uncoated alloys in SBF solution. The novelty lies in applying electrostatic spray deposition to integrate HA and Nb<sub>2</sub>O<sub>5</sub> into PMMA, a method not extensively explored for Co-Cr-Mo implants. These results demonstrate that the hybrid coating effectively enhances surface and mechanical properties, increasing the alloy’s suitability for biomedical applications.</p> Graphical Abstract <p></p>

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Evaluation of HA/Nb2O5-Based Polymer Matrix Coatings on Co-Cr-Mo Alloy for Medical Implants

  • 期刊论文

  • 发表日期：

    2026年2月9日

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  • Shahad S. Al-Mahdawi,
  • Hanaa A. Al-Kaisy,
  • Mohanad N. Al-Shroofy

摘要

Abstract

This research investigates the enhancement of biocompatibility and mechanical properties of Co-Cr-Mo alloys for medical implants using hydroxyapatite (HA) and niobium pentoxide (Nb2O5) incorporated into a PMMA matrix, including a novel hybrid HA/Nb2O5-PMMA coating. Electrostatic spray deposition was employed to apply the coatings. Microstructural analyses confirmed uniform dispersion of particles, improving surface integrity. The hybrid coating exhibited the highest scratch hardness (~12 N/mm2) and improved wettability (contact angle ~ 63°). Coated samples showed reduced ion release compared to uncoated alloys in SBF solution. The novelty lies in applying electrostatic spray deposition to integrate HA and Nb2O5 into PMMA, a method not extensively explored for Co-Cr-Mo implants. These results demonstrate that the hybrid coating effectively enhances surface and mechanical properties, increasing the alloy’s suitability for biomedical applications.

Graphical Abstract