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FUNCTIONAL NANOSTRUCTURED MATERIALS BASED ON TITANIUM DIOXIDE FOR USE IN ORTHOPEDIC DENTISTRY

Subject. The creation of functional ceramic coatings based on titanium dioxide for the manufacture of orthopedic structures, including dental implants and systems for osteosynthesis, helps to prevent possible complications during dental surgical and orthopedic treatment by improving the processes of osseointegration. 
The goal is to develop domestic proprietary technology for producing nanopowders and functional coatings based on titanium dioxide, free of chemical impurities, which can be used in the practice of orthopedic dentistry for the construction of dental and maxillary prostheses, as well as implant systems. 
Methodology. The authors developed and proposed a method for applying to medical devices made of titanium, a nanostructured surface layer of titanium dioxide. To provide an evidence base for the advantages of using the proposed titanium dioxide coating, an experimental study was made of its chemical uniformity and freedom from impurities, as well as an assessment of the adhesion force between the oxide layer deposited by titanium dioxide in the anatase phase and the surface of the titanium support. 
Results. During Raman spectroscopy, titanium dioxide nanopowder did not detect extraneous chemical impurities. According to the results of the method of thermal desorption of nitrogen, the specific surface of the titanium dioxide powder was 67-70 m2 / g, and the average calculated particle size was 20-22 nm. It was shown by optical microscopy that the average thickness of the oxide layer (rutile phase) is 15 ± 5 μm, anatase is 70 ± 10 μm, the adhesion force between the oxide layer (rutile phase) and the titanium base is 6.3 ± 0.1 MPa, at applying anatase - 4.9 ± 0.1 MPa. In the study of the adhesion force of a functional titanium dioxide coating with a titanium base, it was found that the onset of peeling occurs at a load of 8.6 N. 
Conclusions. Studies of a highly developed functional surface layer of nanostructured titanium dioxide indicate the wide possibilities of its use in the practice of a dentist.