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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">vestim</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной  академии наук Беларуси. Серия медицинских наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Medical series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1814-6023</issn><issn pub-type="epub">2524-2350</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">vestim-115</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 И ЭКСПЕРИМЕНТАЛЬНАЯ МЕДИЦИНА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL AND EXPERIMENTAL MEDICINE</subject></subj-group></article-categories><title-group><article-title>Морфология корней и корневых каналов первых и вторых постоянных нижних моляров</article-title><trans-title-group xml:lang="en"><trans-title>Root and canal morphology of the first and second mandibular molars</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мельниченко</surname><given-names>Ю. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Melnichenka</surname><given-names>Y. .</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кабак</surname><given-names>С. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Kabak</surname><given-names>S. .</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Саврасова</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Savrasova</surname><given-names>N. .</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мехтиев</surname><given-names>Р. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Mechtiev</surname><given-names>R. .</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Белорусский государственный медицинский университет</institution><country>Belarus</country></aff><pub-date pub-type="collection"><year>2014</year></pub-date><pub-date pub-type="epub"><day>01</day><month>06</month><year>2016</year></pub-date><volume>0</volume><issue>2</issue><fpage>28</fpage><lpage>32</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Мельниченко Ю.М., Кабак  С.Л., Саврасова  Н.А., Мехтиев  Р.С., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Мельниченко Ю.М., Кабак  С.Л., Саврасова  Н.А., Мехтиев  Р.С.</copyright-holder><copyright-holder xml:lang="en">Melnichenka Y..., Kabak S..., Savrasova N..., Mechtiev R...</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://vestimed.belnauka.by/jour/article/view/115">https://vestimed.belnauka.by/jour/article/view/115</self-uri><abstract><p>Изучены особенности канально-корневой системы первого и второго постоянных моляров нижней челюсти in vivo. На базе 11-й ГКБ г. Минска проанализировано 209 первых и 236 вторых нижних моляров на 129 компьютерных томограммах, полученных с помощью дентального компьютерного томографа SIRONA GALILEOS. Большинство зубов (99 % первых и 91,1 % вторых нижних моляров) имели два раздельных корня. Три корня обнаружены у 1 % первых нижних моляров. С-образная конфигурация корневой системы определена у 5,1 % вторых нижних моляров. В 84,6 % случаев выявлено три корневых канала: два в мезиальном и один в дистальном корне. У 12 % зубов имелось четыре корневых канала. Среди вторых нижних моляров при наличии двух корней в 79,7 % случаев обнаружено три корневых канала, а в 14,4 % случаев - два. В дистальном корне нижних моляров превалировал I тип конфигурации каналов по Vertucci. В мезиальном корне нижних моляров чаще всего обнаруживались IV и II тип конфигурации каналов по Vertucci. Трансверзальные анастомозы выявлены у 21,6 % зубов. Добавочные каналы в 58 % случаев присутствовали в апикальной трети, в 38 % - в средней трети, в 4 % - в шеечной трети корней изученных зубов.</p></abstract><trans-abstract xml:lang="en"><p>The aims of this study were to identify the root canal morphology of the first and second mandibular molars and to define the frequency of the distolingual roots of the first mandibular molars and the C-shaped roots and canals in the second mandibular molars. We collected 209 CBCT images of the first mandibular molars and 236 CBCT images of the second mandibular molars from 129 subjects. Most of the mandibular molars in this study (99 % of the first molars and 91.1 % of the second molars) had two separate roots. The frequency of the three-rooted first mandibular molars was 1 %. The C-shaped configuration of the root system was determined at 5.1 % of the second mandibular molars. Of 209 first mandibular molars examined, three canals were present in 84.6 %, four canals - in 12 %. In the two-rooted second mandibular molars, 79.7 % of cases had three canals and 14.4 % of cases had two canals. The distal root of mandibular molars showed predominantly the I Vertucci type, while the mesial root had more complex canal systems. In most of the cases, the mesial root of the first and second mandibular molars showed IV and II Vertucci types. Transversal anastomoses were detected in 21.6 % of the lower molars. 58 % of the accessory canals were detected in the apical third, 38 % - in the middle third, and 4 % - in the cervical third of the roots of the first and second mandibular molars.</p></trans-abstract></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Ярулина З. И. // X-ray Art. 2012. № 1. С. 8-15.</mixed-citation><mixed-citation xml:lang="en">Ярулина З. И. // X-ray Art. 2012. № 1. 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