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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Traumatology and Orthopedics of Russia</journal-id><journal-title-group><journal-title xml:lang="en">Traumatology and Orthopedics of Russia</journal-title><trans-title-group xml:lang="ru"><trans-title>Травматология и ортопедия России</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2311-2905</issn><issn publication-format="electronic">2542-0933</issn><publisher><publisher-name xml:lang="en">Vreden National Medical Research Center of Traumatology and Orthopedics</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">17417</article-id><article-id pub-id-type="doi">10.17816/2311-2905-17417</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>CLINICAL STUDIES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>КЛИНИЧЕСКИЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="zh"><subject>Clinical studies</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Which Factors Can Lead to Subsidence of a Non-Modular Tapered Stem after Revision Hip Arthroplasty?</article-title><trans-title-group xml:lang="ru"><trans-title>Какие факторы могут привести к проседанию немодульного конического бедренного компонента после ревизионного эндопротезирования тазобедренного сустава?</trans-title></trans-title-group><trans-title-group xml:lang="zh"><trans-title/></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0733-2414</contrib-id><name-alternatives><name xml:lang="en"><surname>Tikhilov</surname><given-names>Rashid M.</given-names></name><name xml:lang="ru"><surname>Тихилов</surname><given-names>Рашид Муртузалиевич</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Sci. (Med.), Professor</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор, чл.-кор. РАН</p></bio><email>rtikhilov@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6745-4707</contrib-id><name-alternatives><name xml:lang="en"><surname>Dzhavadov</surname><given-names>Alisagib A.</given-names></name><name xml:lang="ru"><surname>Джавадов</surname><given-names>Алисагиб Аббасович</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Sci. (Med.), Professor</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>alisagib.dzhavadov@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4353-4710</contrib-id><name-alternatives><name xml:lang="en"><surname>Kopcov</surname><given-names>Artur V.</given-names></name><name xml:lang="ru"><surname>Копцов</surname><given-names>Артур Викторович</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>avkoptsov@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7758-0128</contrib-id><name-alternatives><name xml:lang="en"><surname>Filonov</surname><given-names>Pavel  V.</given-names></name><name xml:lang="ru"><surname>Филонов</surname><given-names>Павел Владимирович</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>drpavelfilonov@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0004-5825-5548</contrib-id><name-alternatives><name xml:lang="en"><surname>Kurbanova</surname><given-names>Saida M.</given-names></name><name xml:lang="ru"><surname>Курбанова</surname><given-names>Саида Минкаиловна</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>Студент</p></bio><email>angelina6791@list.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0218-3106</contrib-id><name-alternatives><name xml:lang="en"><surname>Shubnyakov</surname><given-names>Igor I.</given-names></name><name xml:lang="ru"><surname>Шубняков</surname><given-names>Игорь Иванович</given-names></name><name xml:lang="zh"><surname></surname><given-names></given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>shubnyakov@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Vreden National Medical Research Center of Traumatology and Orthopedics</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр травматологии и ортопедии им. Р.Р. Вредена» Минздрава России</institution></aff><aff><institution xml:lang="zh"></institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Tetyukhin Urals Clinical Treatment and Rehabilitation Center</institution></aff><aff><institution xml:lang="ru">ООО «Уральский клинический лечебно-реабилитационный центр им. В.В. Тетюхина»</institution></aff><aff><institution xml:lang="zh"></institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Pavlov First Saint Petersburg State Medical University</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Первый Санкт-Петербургский государственный медицинский университет им. акад. И.П. Павлова» Минздрава России</institution></aff><aff><institution xml:lang="zh"></institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2024-03-15" publication-format="electronic"><day>15</day><month>03</month><year>2024</year></pub-date><pub-date date-type="pub" iso-8601-date="2024-03-31" publication-format="electronic"><day>31</day><month>03</month><year>2024</year></pub-date><volume>30</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>42</fpage><lpage>51</lpage><history><date date-type="received" iso-8601-date="2023-11-28"><day>28</day><month>11</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2024-02-28"><day>28</day><month>02</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Эко-Вектор</copyright-statement><copyright-statement xml:lang="zh">Copyright ©; 2024,</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journal.rniito.org/jour/article/view/17417">https://journal.rniito.org/jour/article/view/17417</self-uri><abstract xml:lang="en"><p><bold>Aim of the study<italic> </italic></bold>— to evaluate our own experience of the use of non-modular tapered stems in revision hip arthroplasty to determine the incidence and causes of repeated revisions, functional outcomes, and factors associated with subsidence of non-modular tapered stems.</p> <p><bold>Methods.</bold> We retrospectively analyzed the results of using 78 non-modular tapered stems. The average follow-up period was 5.1 years.</p> <p><bold>Results.</bold> There were repeated revisions accompanied by the removal of non-modular tapered stems in 14 (17.9%) cases. Significant subsidence was observed in 5 (6.4%) cases. Bicortical contact less than 2.0 cm (p = 0.017) was a risk factor for subsidence of non-modular tapered stems. The risk of having a bicortical contact of less than 2 cm was higher in patients with type IV femoral defect (p = 0.048). An improvement in functional parameters was found. Patients with significant subsidence of non-modular tapered stems had worse functional outcomes compared to patients without significant subsidence.</p> <p><bold>Conclusions.</bold> The use of non-modular tapered stems in revision hip arthroplasty shows good results in terms of repeated revision rates and functional outcomes. Periprosthetic infection and aseptic loosening were the most frequent causes of repeated revisions with removal of non-modular tapered stems. All patients with significant subsidence of non-modular tapered stems underwent repeated revision due to aseptic loosening. Bicortical contact less than 2.0 cm was a risk factor for significant subsidence of non-modular tapered stems. The risk of bicortical contact less than 2.0 cm was higher in patients with type IV femoral defects. Therefore, it is recommended to use non-modular tapered stems with caution or consider other hip reconstruction options in this type of defect.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Цель исследования<italic> </italic></bold>— оценка собственного опыта использования немодульных конических бедренных компонентов при ревизионном эндопротезировании тазобедренного сустава для определения частоты и причин повторных ревизий, функциональных результатов, а также факторов, ассоциированных с проседанием немодульных конических бедренных компонентов.</p> <p><bold>Материал и методы.</bold> Был проведен ретроспективный анализ результатов использования немодульных конических бедренных компонентов (НКБК) в 78 случаях. Средний срок наблюдения составил 5,1 лет.</p> <p><bold>Результаты.<italic> </italic></bold>В 14 (17,9%) случаях были выполнены повторные ревизии, сопровождающиеся удалением НКБК. Значительное проседание наблюдалось в 5 (6,4%) случаях. Бикортикальный контакт менее 2,0 см (<italic>p</italic> = 0,017) был фактором риска проседания немодульных конических бедренных компонентов. Риск получения бикортикального контакта менее 2 см был выше у пациентов с дефектом бедренной кости IV типа (<italic>p </italic>= 0,048). Было выявлено улучшение функциональных показателей. Пациенты со значительным проседанием НКБК имели худшие функциональные результаты по сравнению с пациентами без значительного проседания.</p> <p><bold>Заключение.<italic> </italic></bold>Использование НКБК при ревизионном эндопротезировании тазобедренного сустава показывает хорошие результаты в отношении частоты повторных ревизий и функциональных показателей. Наиболее частыми причинами повторных ревизий с удалением НКБК были перипротезная инфекция и асептическое расшатывание. У всех пациентов со значительным проседанием НКБК была выполнена повторная ревизия по причине асептического расшатывания. Бикортикальный контакт менее 2,0 см являлся фактором риска значительного проседания НКБК. Риск возникновения бикортикального контакта менее 2,0 см был выше у пациентов с дефектами бедренной кости IV типа, поэтому при данном типе дефекта рекомендуется использовать НКБК с осторожностью или рассматривать другие варианты реконструкции бедра.</p></trans-abstract><trans-abstract xml:lang="zh"><p/></trans-abstract><kwd-group xml:lang="en"><kwd>revision hip arthroplasty</kwd><kwd>non-modular tapered stem</kwd><kwd>bicortical contact</kwd><kwd>femoral defects</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>ревизионное эндопротезирование тазобедренного сустава</kwd><kwd>немодульный конический бедренный компонент</kwd><kwd>бикортикальный контакт</kwd><kwd>дефект бедренной кости</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Furnes O.G.J., Hallan G., Visnes H., Gundersen T., Fenstad A.M., Dybvik E. et al. 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