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Titanium Coatings and Surface Modifications: Toward Clinically Useful Bioactive Implants.

Ana Civantos1,2, Enrique Martínez-Campos1,2, Viviana Ramos1,3

  • 1Tissue Engineering Group, Institute of Biofunctional Studies, Associated Unit to the Institute of Polymer Science and Technology (CSIC), Pharmacy Faculty, Complutense University of Madrid (UCM), Paseo Juan XXIII 1, 28040 Madrid, Spain.

ACS Biomaterials Science & Engineering
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Summary
This summary is machine-generated.

Titanium implants enhance bone repair through surface modifications. This review details various functionalization methods, focusing on biological relevance and clinical applications for improved osseointegration.

Keywords:
bonecoatingsimplantsosseointegrationtissue engineeringtitanium

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Area of Science:

  • Biomaterials Science
  • Orthopedic Surgery
  • Tissue Engineering

Background:

  • Titanium (Ti) is a key material for bone repair implants due to its mechanical strength and osseointegration capabilities.
  • Osseointegration, the direct structural and functional connection between living bone and an implant surface, is crucial for implant success.
  • Complications like implant loosening and infection necessitate improved implant designs and surface properties.

Purpose of the Study:

  • To review surface modifications of titanium (Ti) implants for bone repair.
  • To focus on the biological relevance and targeted issues of each modification approach.
  • To summarize clinically available and investigational surface modification strategies.

Main Methods:

  • Review of historical relevance of Ti in implants and the osseointegration process.
  • Exploration of physical and chemical surface modifications of Ti.
  • Analysis of inorganic and organic coatings for Ti devices.
  • Summary of clinical status of surface-modified Ti implants.

Main Results:

  • Titanium's inherent properties support osseointegration, but surface functionalization offers enhanced biological benefits.
  • Various physical (e.g., etching, blasting) and chemical (e.g., anodization, silanization) methods can alter Ti surface topography and chemistry.
  • Inorganic coatings (e.g., hydroxyapatite, bioactive glasses) and organic coatings (e.g., growth factors, peptides) aim to improve cellular response and bone formation.
  • A range of surface modification techniques are either clinically implemented or under active clinical investigation.

Conclusions:

  • Surface modification of titanium implants is a critical strategy to enhance osseointegration and address clinical challenges in bone repair.
  • The choice of surface modification depends on the specific biological goals, ranging from improved cell adhesion to targeted drug delivery.
  • Continued research and clinical trials are essential to optimize surface-engineered titanium implants for superior patient outcomes.