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Hydroxyapatite-coating on titanium arc sprayed titanium implants

Y Nakashima1, K Hayashi, T Inadome

  • 1Department of Orthopaedic Surgery, Faculty of Medicine, Kyushu University, Fukuoka, Japan.

Journal of Biomedical Materials Research
|June 5, 1997
PubMed
Summary
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A new titanium arc spray technique enables even hydroxyapatite (HA) coating on rough implant surfaces, improving bone integration. This method enhances interfacial shear strength, offering a solution for dental and orthopedic implants.

Area of Science:

  • Biomaterials Engineering
  • Orthopedic Implants
  • Surface Science

Background:

  • Conventional hydroxyapatite (HA)-coated and porous-coated implants face challenges with coating detachment and pore obstruction.
  • Titanium arc spray is a novel technique for creating rough implant surfaces suitable for HA coating.

Purpose of the Study:

  • To evaluate a new titanium arc spray technique for implant surface modification.
  • To assess the impact of HA coating on titanium arc sprayed surfaces.
  • To compare the bone-implant interfacial shear strength of various implant surface treatments.

Main Methods:

  • Titanium arc spray and sandblasting were used to create roughened Ti-6A1-4V implant surfaces.
  • Scanning electron microscopy (SEM) analyzed surface morphology and HA coating.

Related Experiment Videos

  • Canine transcortical push-out models assessed interfacial shear strength at 4 and 12 weeks.

    • Main Results:

    • Titanium arc spraying resulted in even HA coating without pore obstruction.
    • Interfacial shear strength increased with surface roughness.
    • HA-coated titanium arc sprayed implants showed significantly greater shear strength than smooth HA-coated or bead-coated implants.

    Conclusions:

    • HA coating on rough surfaces created by titanium arc spray enhances mechanical anchoring to bone.
    • This technique offers a promising solution to overcome limitations of current HA-coated and porous-coated implants.
    • Even HA coating on roughened surfaces is crucial for improved implant stability.