Titanium implants with oxidized surfaces: The background and long-term results

Christian Toth, György Szabó, Lajos Kovács, Kálmán Vargha, József Barabás, Zsolt Németh

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The purpose of this paper is to give an overview of different implant surface modification technologies - including the presentation of a new technique, involving the formation of a ceramic titanium oxide coating. Three techniques are used to modify metal surfaces: (1) addition of material, (2) removal of material and (3) modification of material already present, e.g. by means of laser or electron-beam thermal treatment. The new technique outlined in this paper relates to the production of a corrosion-resistant, 2000-2500 Å thick, ceramic oxide layer with a consistent crystalline structure on the surface of a titanium implant. The layer is grown electrochemically from the bulk of the metal and modified by heat treatment. Such ceramic oxide-coated implants have advantageous properties compared to implants covered with other coatings: a higher external hardness; a greater force of adhesion between the titanium and the ceramic oxide coating; virtually perfect insulation between an organism and a metal and therefore no possibility of triggering metal allergy. Plates and screws for maxillofacial osteosynthesis and dental root implants with ceramic oxide coatings were subjected to various physical, chemical and electron microscope tests for qualitative characterization, and have been applied in surgical practice over a period of 15 years. The mini-plates removed were examined for the possible surface alterations which may occur during the implantation period. The sites of the removal were inspected for metallosis, which is common when titanium mini-plates are used. The results obtained demonstrate the good properties of the ceramic. oxide-coated implants.

Original languageEnglish
Pages (from-to)813-818
Number of pages6
JournalSmart Materials and Structures
Volume11
Issue number5
DOIs
Publication statusPublished - Oct 1 2002

ASJC Scopus subject areas

  • Signal Processing
  • Civil and Structural Engineering
  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Electrical and Electronic Engineering

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