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Protein adsorption on a laser-modified titanium implant surface.

Silvia Cei1, Dimitra Karapetsa, Emanuela Aleo

  • 1*Junior Researcher, Unit of Dentistry and Oral Surgery, Department of Surgical and Medical Pathology, University of Pisa, Pisa, Italy. †PhD Student, Unit of Dentistry and Oral Surgery, Department of Surgical and Medical Pathology, University of Pisa, Pisa, Italy. ‡Biologist, Istituto di Genomica Applicata, Udine, Italy. §Assistant Professor, Unit of Dentistry and Oral Surgery, Department of Surgical and Medical Pathology, University of Pisa, Pisa, Italy.

Implant Dentistry
|February 24, 2015
PubMed
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Laser-treated titanium surfaces significantly enhance albumin and fibronectin adsorption, promoting earlier osseointegration compared to sandblasted or machined surfaces.

Area of Science:

  • Biomaterials Science
  • Surface Engineering
  • Osseointegration Research

Background:

  • Osseointegration is crucial for dental and orthopedic implant success.
  • Surface topography influences protein adsorption, a key factor in early osseointegration.
  • Laser treatment offers a novel approach to modify titanium implant surfaces.

Purpose of the Study:

  • To evaluate the early-stage osseointegration of laser-treated titanium implant surfaces.
  • To investigate the effect of laser treatment on human protein adsorption.
  • To compare protein adsorption on laser-treated (LT) versus sandblasted (SB) and machined (M) titanium surfaces.

Main Methods:

  • Titanium discs with machined (M), sandblasted (SB), and laser-treated (LT) surfaces were prepared.

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  • X-ray photoelectron spectroscopy (XPS) analyzed surface elemental composition.
  • Albumin and fibronectin adsorption were quantified using fluorescence intensity and Western Blot analysis.

    • Main Results:

    • Laser-treated (LT) titanium surfaces showed significantly higher albumin and fibronectin adsorption compared to sandblasted (SB) surfaces.
    • Mean albumin adsorption: 3.8 (LT) vs. 0.29 (SB) (P=0.016).
    • Mean fibronectin adsorption: 4.9 (LT) vs. 0.67 (SB) (P=0.02).
    • XPS confirmed the presence of titanium, oxygen, carbon, and nitrogen on all surfaces.

    Conclusions:

    • The laser-engineered porous titanium surface promotes greater in vitro adsorption of albumin and fibronectin.
    • This enhanced protein adsorption suggests improved potential for earlier osseointegration.
    • Laser treatment represents a promising surface modification strategy for dental and orthopedic implants.