RESULTS OF EXPERIMENTAL STUDY OF ORTHODONTIC TEETH EXTRUSION

Pavlenko V. O., Opanasjuk A. S., Gargin V. V. RESULTS OF EXPERIMENTAL STUDY OF ORTHODONTIC TEETH EXTRUSION. Актуальні проблеми транспортної медицини / Actual problems of transport medicine / 2019;3(57):118-126. ISSN 1818-9385 DOI http://dx.doi.org/10.5281/zenodo.3465420 http://aptm.org.ua УДК 611.08+616.314-089.23 (048) RESULTS OF EXPERIMENTAL STUDY OF ORTHODONTIC TEETH EXTRUSION Pavlenko V. O., Opanasjuk A. S., Gargin V. V. P. L. Shupik national medical Academy of postgraduate education *Kharkiv national medical University Summary Purpose of research. To study the state of bone tissue in orthodontic extrusion of teeth by directed osteoregeneration arc 0,014 NTI. Material and methods. The material for the morphological study was the bone tissue of the jaws of animals (male rabbits of the Dutch breed at the age of 16-18 months). We used 10 animals. To determine the processes occurring in the bone tissue during orthodontic extrusion, an appropriate treatment regimen was applied. The extrusion period was 6 weeks. After this period, the animals were withdrawn from the experiment. Research results and their discussion. Histological examination of micropreparations group of animals (which conducted a directed arc osteoregeneration 0,014 NіTі) the hole of the tooth completely filled with bone. In micropreparations stained with hematoxilin and eosin, it was found that on the 42nd day of the controlled modulation of the regenerative process, signs of replacement of the tooth well with almost Mature bone tissue of a predominantly spongy type of structure were revealed. Zones corresponding to the cortical type of structure are present, but their specific area is insignificant. Conclusions. Histological examination of the preparations in a group of experimental animals (rabbits), which underwent orthodontic extrusion of teeth by directed osteoregeneration arc 0,014 NiTi showed that the process of bone tissue regeneration passes the stages of osteoid deposition and osteoblastic proliferation. In this case, the signs of osteoclastic resorption of the bone matrix are unexpressed, which indicates the completion of this stage of regeneration. The low proliferative activity of osteoblasts and the predominance of Mature osteocytes testify to the maturity of bone elements. Key words: bone tissue, extrusion, orthodontic treatment