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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vfumed</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Северо-Восточного федерального университета имени М.К. Аммосова. Vestnik of North-Eastern Federal University. Серия «Медицинские науки. Medical Sciences»</journal-title><trans-title-group xml:lang="en"><trans-title>Vestnik of North-Eastern Federal University. Medical Sciences</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2587-5590</issn><publisher><publisher-name>Северо-Восточный федеральный университет имени М.К. Аммосова</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.25587/2587-5590-2025-2-32-38</article-id><article-id custom-type="elpub" pub-id-type="custom">vfumed-354</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>КЛИНИЧЕСКАЯ МЕДИЦИНА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL MEDICINE</subject></subj-group></article-categories><title-group><article-title>Морфология эндодонта нижних моляров в бурятской этнической популяции</article-title><trans-title-group xml:lang="en"><trans-title>Morphology of the endodont of mandibular molars in Buryat population</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2373-2824</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кукушкин</surname><given-names>В. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Kukushkin</surname><given-names>V. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кукушкин Вячеслав Леонидович – доцент, кандидат медицинских наук, доцент кафедры терапевтической стоматологии ФГБОУ ВО «ЧГМА».</p><p>Чита</p></bio><bio xml:lang="en"><p>Vyacheslav L. Kukushkin – Docent, Cand. Sci. (Medicine), Associate Professor, Department of Therapeutic Dentistry, Chita State Medical Academy.</p><p>Chita</p></bio><email xlink:type="simple">KukushkinVLK@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0003-4116-1951</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зобнин</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zobnin</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Зобнин Валерий Валерьевич – доцент, кандидат медицинских наук, заведующий кафедрой стоматологии ФДПО ЧГМА.</p><p>Чита</p></bio><bio xml:lang="en"><p>Valery V. Zobnin – Docent, Cand. Sci. (Medicine), Head of the Department of Dentistry, Chita State Medical Academy.</p><p>Chita</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кукушкина</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kukushkina</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кукушкина Елена Анатольевна – ассистент кафедры терапевтической стоматологии ЧГМА, кандидат медицинских наук.</p><p>Чита</p></bio><bio xml:lang="en"><p>Elena A. Kukushkina – Cand. Sci. (Medicine), Assistant Lecturer, Department of Therapeutic Dentistry, Chita State Medical Academy.</p><p>Chita</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Смирницкая</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Smirnitskaya</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Смирницкая Марина Валентиновна – доцент, кандидат медицинских наук, доцент кафедры стоматологии ФДПО ЧГМА.</p><p>Чита</p></bio><bio xml:lang="en"><p>Marina V. Smirnitskaya – Docent, Cand. Sci. (Medicine), Associate Professor, Department of Dentistry, Faculty of Continuing Professional Education, Chita State Medical Academy.</p><p>Chita</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Читинская государственная медицинская академия</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Chita State Medical Academy</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>11</day><month>07</month><year>2025</year></pub-date><volume>0</volume><issue>2</issue><fpage>32</fpage><lpage>38</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кукушкин В.Л., Зобнин В.В., Кукушкина Е.А., Смирницкая М.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Кукушкин В.Л., Зобнин В.В., Кукушкина Е.А., Смирницкая М.В.</copyright-holder><copyright-holder xml:lang="en">Kukushkin V.L., Zobnin V.V., Kukushkina E.A., Smirnitskaya M.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.smnsvfu.ru/jour/article/view/354">https://www.smnsvfu.ru/jour/article/view/354</self-uri><abstract><p>Особый интерес для клиницистов представляют сведения о дополнительных корнях и каналах нижних моляров, в частности дистоязычного корня, называемого в литературе Radix Entomolaris (RE). В предыдущем исследовании высказано предположение о влиянии брахицефалического типа черепа монголоидов (бурят) на частоту встречаемости RE. Однако конкретных исследований подобной связи в доступной литературе мы не обнаружили. Цель исследования – изучить корреляцию между частотой встречаемости корня RE и типом черепа в различных этнических группах населения на основании данных кефалометрии и конусно-лучевой компьютерной томографии (КЛКТ) черепа. Материалы и методы: при первичном осмотре лиц, обратившихся в поликлинику, выделена опытная группа из 186 лиц – представителей коренного этноса Забайкалья и изучены их КЛКТ-граммы черепа. Проведено разделение на кефалометрические группы (брахи-, мезо-, долихоцефалы), оценены частота выявления корня RE в каждой подгруппе, и корреляции типа черепа и частоты встречаемости RE с использованием пакета программ статистического анализа Statisticа.10 (StatSoft, USA). Результаты. Анализ показал очень слабую положительную связь распределения RE с типом черепа у исследуемого этноса. Частота обнаружения RE у лиц бурятского этноса достоверно выше, чем у европеоидов. Отдельный дистоязычный корень первого нижнего моляра был обнаружен в 9,7 % случаев (в контроле – 0 %, χ2=6,87; р&lt;0,05). Корреляции между частотой выявления RE и типа черепа в опытной группе не выявлено (r=0,12; р&gt;0,05), что позволяет считать наличие этого корня у изучаемого этноса эуморфным (наследуемым) анатомическим признаком.</p></abstract><trans-abstract xml:lang="en"><p>Of particular interest to clinicians is information about the accessory roots and canals of the mandibular molars, in particular the distolingual root, called Radix Entomolaris (RE) in the literature. A previous study suggested the influence of the brachycephalic type of skull of the Mongoloids (Buryats) on the incidence of RE. However, we did not find specific studies of such a connection in the available literature. The aim. To study the correlation between the frequency of occurrence of the RE root and the type of skull in different ethnic groups of the population based on cephalometric and cone beam computed tomography (CBCT) data of the skull. Materials and methods. During the initial examination of people who applied to the clinic, an experimental group of 186 people, representatives of the indigenous ethnic group of Transbaikalia, was identified and their CT scans of the skull were studied. A division into cephalometric groups (brachy-, meso-, dolichocephalic) was carried out, the frequency of detection of the RE root in each subgroup was assessed, and correlations between the type of skull and the frequency of occurrence of RE were assessed using the Statistica.10 statistical analysis software package (StatSoft, USA). Results. The analysis showed a very weak positive relationship between the distribution of RE and the type of skull in the studied ethnic group. The frequency of RE detection in Buryat ethnic groups is significantly higher than in Caucasians. A separate distolingual root of the first mandibular molar was detected in 9,7 % of cases (in the control – 0 %; χ2=6,87; p&lt;0,05). There was no correlation between the frequency of RE detection and the type of skull in the experimental group (r=0,12; р&gt;0,05), which allows us to consider the presence of this root in the studied ethnic group as an eumorphic (inherited) anatomical feature. Сonclusion. The frequency of RE detection in individuals of the Buryat ethnic group of Transbaikalia is 9,7 %, which is significantly higher than in Caucasians. The absence of a correlation between the frequency of RE detection and the type of skull allows us to consider the presence of this root in the Buryat ethnic group as an eumorphic (inherited) anatomical feature.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>эндодонтия</kwd><kwd>КЛКТ</kwd><kwd>череп</kwd><kwd>индекс Ретциуса</kwd><kwd>тип строения черепа</kwd><kwd>анатомический признак</kwd><kwd>нижние моляры</kwd><kwd>дополнительный дистоязычный корень RE</kwd><kwd>монголоиды</kwd><kwd>европеоиды</kwd></kwd-group><kwd-group xml:lang="en"><kwd>endodontics</kwd><kwd>computer tomography</kwd><kwd>skull</kwd><kwd>Retzius index</kwd><kwd>skull structure type</kwd><kwd>anatomical feature</kwd><kwd>lower molars</kwd><kwd>additional distolingual root RE</kwd><kwd>Mongoloids</kwd><kwd>Europeans</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Авторы выражают благодарность Аюшиеву С.Д., главному врачу городской стоматологической поликлиники № 2 г. Улан-Удэ Республики Бурятии за помощь в организации набора клинического материала для исследования.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Дмитриенко С.В., Краюшкин А.И., Сапин М.Р. Анатомия зубов человека. Москва-Н. Новгород; 2003:226.</mixed-citation><mixed-citation xml:lang="en">Dmitrienko S.V., Krayushkin A.I., Sapin M.R. Anatomy of human teeth. Moscow-N. Novgorod, 2003:226. (In Russian)</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Кукушкин В.Л., Кукушкина Е.А., Кукушкин Я.В. Этнические особенности топографии эндодонта (по данным компьютерной томографии) Эндодонтия today. 2015;4:26-28.</mixed-citation><mixed-citation xml:lang="en">Kukushkin V.L., Kukushkina E.A., Kukushkin Ya.V. Ethnic features of endodont topography (according to a computer tomography). 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