Цель. Определить влияние синтетического гидроксиапатита в составе композита с аутофибрином на неспецифическую резистентность эпителиальных клеток слизистой носа и щеки. Материалы и методы. Исследование проведено на основании соскобов со слизистой полости носа и щеки у 27 здоровых добровольцев. Сформировано 27·12=324 цитологических препарата. In vitro проведен эксперимент с микроскопией под иммерсионным увеличением, показывающий влияние экспериментальных агентов, таких как пероксид водорода и компоненты композита (на основе гидроксиапатита и аутофибрина), на эпителиальные клетки слизистой дна полости носа и щеки. In vitro установлено, что при контакте эпителиоцитов с дистиллированной водой значительно повреждаются клетки эпителия, поэтому 3% пероксид водорода разбавляли физиологическим раствором 1:10. Результаты. Аутофибрин снижает деструктивное действие гидроксиапатита и повышает безопасность композита. Установлено, что степень негативного воздействия экспериментальных агентов на эпителий увеличивалась в ряду: аутофибрин > композит аутофибрин/гидроксиапатит > раствор пероксида водорода > гидроксиапатит > дистиллированная вода. При использовании аутофибрина в композите с гидроксиапатитом эпителиоциты носа и щеки имели более высокие показатели неспецифической резистентности по отношению к гидроксиапатиту. Заключение. Установлено, что для улучшения показателей неспецифической резистентности необходимо использовать гибридные композиты аутофибрин/гидроксиапатит, в которых аутофибрин уменьшает негативное влияние гидроксиапатита на эпителиоциты слизистой оболочки носа и щеки. Purpose. To determine the effect of synthetic hydroxyapatite as part of a composite with autofibrin on the nonspecific resistance of epithelial cells of the nasal and buccal mucosa. Materials and methods. The study was conducted on the basis of scrapings from the mucous membrane of the nasal cavity and cheeks in 27 healthy volunteers. 27·12=324 cytological preparations were formed. An in vitro experiment was carried out with microscopy under immersion magnification, showing the effect of experimental agents, such as hydrogen peroxide and composite components (based on hydroxyapatite and autofibrin) on the epithelial cells of the mucous membrane of the floor of the nasal cavity and cheek. In vitro, it was established that epitheliocytes were significantly damaged upon contact with distilled water, so 3% hydrogen peroxide was diluted by saline as 1:10. Results. Autofibrin reduces hydroxyapatite destructive effect and increases the safety of the composite. It was established that the degree of negative impact of experimental agents on the epithelium increased in the following order: autofibrin > autofibrin/ hydroxyapatite composite > hydrogen peroxide solution > hydroxyapatite > distilled water. When using autofibrin in a composite with hydroxyapatite, epithelial cells of the nose and cheeks had higher rates of nonspecific resistance against hydroxyapatite. Conclusion. It has been established that in order to improve nonspecific resistance indicators, autofibrin/hydroxyapatite hybrid composites should be used, in which autofibrin reduces the negative effect of hydroxyapatite on the epithelial cells of the nasal and buccal mucosa.
The structure and physicochemical mechanisms of interaction of bone tissue with titanium implants in tuberculous osteitis have been studied by scanning electron microscopy, X-ray phase analysis, IR spectroscopy and thermal analysis methods. It has been found that the physiological regeneration of bone tissue is accompanied by growth of organic components, embrittlement of the mineral phase of the bone matrix, and its fine disintegration during the treatment of tuberculosis osteitis. The presence of titanium implants during a physiologically normal state contributes to the activation of apatite phase synthesis in the regenerating bone. The main mechanism of implantation osteogenesis in tuberculous osteitis is the formation of the inorganic phase of hydroxyapatite mainly in the areas of destruction of the titanium alloy.
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