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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">17838</article-id><article-id pub-id-type="doi">10.17816/2311-2905-17838</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">Primary total hip arthroplasty in patients with Dorr type C femoral bone morphology</article-title><trans-title-group xml:lang="ru"><trans-title>Первичное эндопротезирование тазобедренного сустава у пациентов с морфологическим типом C костномозгового канала по классификации Dorr</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/0000-0001-8392-5380</contrib-id><contrib-id contrib-id-type="spin">8458-9436</contrib-id><name-alternatives><name xml:lang="en"><surname>Tsed</surname><given-names>Aleksander N.</given-names></name><name xml:lang="ru"><surname>Цед</surname><given-names>Александр Николаевич</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.)</p></bio><bio xml:lang="ru"><p>д-р мед. наук</p></bio><email>travma1@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7264-7861</contrib-id><contrib-id contrib-id-type="spin">9000-7630</contrib-id><name-alternatives><name xml:lang="en"><surname>Mushtin</surname><given-names>Nikita E.</given-names></name><name xml:lang="ru"><surname>Муштин</surname><given-names>Никита Евгеньевич</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>Cand. Sci. (Med.)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>mushtin.nikita@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4079-5541</contrib-id><contrib-id contrib-id-type="spin">4663-1741</contrib-id><name-alternatives><name xml:lang="en"><surname>Dulaev</surname><given-names>Aleksander K.</given-names></name><name xml:lang="ru"><surname>Дулаев</surname><given-names>Александр Кайсинович</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</p></bio><email>akdulaev@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1181-6545</contrib-id><contrib-id contrib-id-type="spin">6025-4918</contrib-id><name-alternatives><name xml:lang="en"><surname>Schmeljew</surname><given-names>Anton V.</given-names></name><name xml:lang="ru"><surname>Шмелев</surname><given-names>Антон 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>schmeljew@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8961-2841</contrib-id><contrib-id contrib-id-type="spin">8553-2710</contrib-id><name-alternatives><name xml:lang="en"><surname>Gvenetadze</surname><given-names>Vadim V.</given-names></name><name xml:lang="ru"><surname>Гвенетадзе</surname><given-names>Вадим Валерьянович</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>Cand. Sci. (Med.)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>vadimgven@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1160-3045</contrib-id><contrib-id contrib-id-type="spin">3969-1790</contrib-id><name-alternatives><name xml:lang="en"><surname>Zhukovets</surname><given-names>Igor Y.</given-names></name><name xml:lang="ru"><surname>Жуковец</surname><given-names>Игорь Юрьевич</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>torra1840@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><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="2026-08-26" publication-format="electronic"><day>26</day><month>08</month><year>2026</year></pub-date><pub-date date-type="pub" iso-8601-date="2026-09-29" publication-format="electronic"><day>29</day><month>09</month><year>2026</year></pub-date><volume>32</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>68</fpage><lpage>82</lpage><history><date date-type="received" iso-8601-date="2026-02-06"><day>06</day><month>02</month><year>2026</year></date><date date-type="accepted" iso-8601-date="2026-06-11"><day>11</day><month>06</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Эко-Вектор</copyright-statement><copyright-statement xml:lang="zh">Copyright ©; 2026, Eco-Vector</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><copyright-holder xml:lang="zh">Eco-Vector</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/17838">https://journal.rniito.org/jour/article/view/17838</self-uri><abstract xml:lang="en"><p><bold>Background.<italic> </italic></bold>The choice of femoral component in total hip arthroplasty (THA) remains challenging in patients with Dorr type C femoral morphology. Traditionally, cemented femoral components have been used; however, they are associated with a high rate of long-term complications.</p> <p><bold>The aim of the study</bold> — to evaluate the clinical and radiographic outcomes of primary total hip arthroplasty in patients with Dorr type C femoral morphology.</p> <p><bold>Methods.</bold> This single-center retrospective stratified study included 76 patients with Dorr type C femoral bone who underwent primary total hip arthroplasty between 2018 and 2024. Patients were divided into three groups according to the type of femoral component fixation: Group I (n = 23) — cemented; Group II (n = 34) — cementless; Group III (n = 19) — revision femoral components. The following parameters were assessed: the Barnett-Nordin index, canal-to-calcar ratio (CCR), intraoperative blood loss, operative time, functional outcomes according to the Oxford Hip Score (OHS-48) and the UCLA Activity Score, and the number and type of complications.</p> <p><bold>Results.</bold> The mean follow-up period was 44.3±9.2 months, and the mean intraoperative blood loss was 488.8±55.3 ml. Functional outcomes after THA did not differ significantly between the cemented and cementless stem groups. A statistically significant improvement (p = 0.04) was observed among patients who received revision femoral components. ROC analysis was performed for two radiographic parameters — the Barnett-Nordin index and CCR. Threshold values associated with an increased risk of complications were identified: for the Barnett-Nordin index, 0.17 (OR 10.6; 95% CI 2.77-40.84); and for the CCR, 0.92 (OR 9.6; 95% CI 2.50-35.90). Periprosthetic femoral fractures occurred in 6.5% of cases as early complications.</p> <p><bold>Conclusion.<italic> </italic></bold>There was no statistically significant difference in long-term functional outcomes (beyond 3 years) after total hip arthroplasty between cemented and cementless femoral components in patients with Dorr type C femoral bone. In patients with the Barnett-Nordin index &lt; 0.170 and a CCR &gt; 0.920, the use of cementless revision stems was associated with fewer complications and better functional outcomes in the early postoperative period.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Актуальность.<italic> </italic></bold>Выбор бедренного компонента при эндопротезировании тазобедренного сустава (ЭП ТБС) у пациентов с типом С костномозгового канала по классификации Dorr вызывает сложности. Традиционно используются бедренные компоненты цементной фиксации, однако в отдаленном периоде это приводит к большому количеству осложнений.</p> <p><bold>Цель исследования</bold> — оценить клинические и рентгенологические результаты первичного эндопротезирования тазобедренного сустава у пациентов с морфологическим типом C костномозгового канала по классификации Dorr.</p> <p><bold>Материал и методы.</bold> В одноцентровое ретроспективное стратифицированное исследование вошли 76 пациентов с типом C костномозгового канала по Dorr, которым в период с 2018 по 2024 г. было выполнено первичное ЭП ТБС. Пациенты были разделены на три группы в зависимости от типа фиксации бедренного компонента: группа I (<italic>n </italic>=<italic> </italic>23) — цементная, II (<italic>n </italic>=<italic> </italic>34) — бесцементная, III (<italic>n </italic>=<italic> </italic>19) — ревизионные бедренные компоненты. Оцениваемые показатели: индекс Barnett-Nordin, индекс Dorr (canal-to-calcar ratio, CCR), объем интраоперационной кровопотери, длительность операции, функциональные результаты по шкалам OHS-48 и UCLA Activity Score, количество и характер осложнений.</p> <p><bold>Результаты.</bold> Средний срок наблюдения пациентов составил 44,3±9,2 мес., средний объем интраоперационной кровопотери — 488,8±55,3 мл. Функциональные результаты после ЭП ТБС в группах с цементными и бесцементными ножками не имели статистических различий. У пациентов группы III, которым имплантировали ревизионные бедренные компоненты, отмечено статистически значимое улучшение функционального результата (<italic>p </italic>= 0,04) по сравнению с пациентами, которым устанавливали стандартные бедренные компоненты. Проведен ROC-анализ двух рентгенологических показателей — морфокортикального индекса Barnett-Nordin и индекса Dorr (CCR). Установлены пороговые значения, ассоциированные с повышенным риском развития осложнений: для морфокортикального индекса Barnett-Nordin — 0,17 (ОШ 10,6; 95% ДИ 2,77–40,84), для индекса CCR — 0,92 (ОШ 9,6; 95% ДИ 2,50–35,90). В структуре ранних осложнений с частотой 6,5% встречались перипротезные переломы бедренной кости.</p> <p><bold>Заключение.</bold> Применение цементных или бесцементных бедренных компонентов статистически значимо не влияет на отдаленные (более трех лет) функциональные результаты эндопротезирования тазобедренного сустава у пациентов с костномозговым каналом типа C по Dorr. При значениях морфокортикального индекса &lt; 0,170 и индекса CCR &gt; 0,920 использование бесцементных ревизионных ножек демонстрирует меньшее количество осложнений и лучшие функциональные результаты в раннем послеоперационном периоде.</p></trans-abstract><trans-abstract xml:lang="zh"><p/></trans-abstract><kwd-group xml:lang="en"><kwd>total hip arthroplasty</kwd><kwd>femoral canal</kwd><kwd>cementless revision femoral components</kwd><kwd>Barnett-Nordin index</kwd><kwd>Dorr index</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>эндопротезирование тазобедренного сустава</kwd><kwd>костномозговой канал бедра</kwd><kwd>бесцементные ревизионные бедренные компоненты</kwd><kwd>индекс Barnett-Nordin</kwd><kwd>индекс Dorr</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Шубняков И.И., Риахи А., Денисов А.О., Корыткин А.А., Алиев А.Г., Вебер Е.В. и др. 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