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.