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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">Russian Journal of Dentistry</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Dentistry</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский стоматологический журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1728-2802</issn><issn publication-format="electronic">2413-2934</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">690526</article-id><article-id pub-id-type="doi">10.17816/dent690526</article-id><article-id pub-id-type="edn">BORKMS</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Original Study Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Оригинальные исследования</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">Comparative analysis of the surface topography of thermoplastic and acrylic dental materials using scanning electron microscopy: a nonrandomized controlled laboratory study</article-title><trans-title-group xml:lang="ru"><trans-title>Сравнительный анализ поверхности термопластических и акриловых стоматологических материалов с помощью сканирующей электронной микроскопии: нерандомизированное контролируемое лабораторное исследование</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7119-002X</contrib-id><contrib-id contrib-id-type="spin">3406-1509</contrib-id><name-alternatives><name xml:lang="en"><surname>Nikolenko</surname><given-names>Denis A.</given-names></name><name xml:lang="ru"><surname>Николенко</surname><given-names>Денис Андреевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>nikolenko_d_a@staff.sechenov.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-7057-4638</contrib-id><name-alternatives><name xml:lang="en"><surname>Berezinskaya</surname><given-names>Anna S.</given-names></name><name xml:lang="ru"><surname>Березинская</surname><given-names>Анна Сергеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD</p></bio><email>berezinskaya_a_s@staff.sechenov.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0009-1466-0193</contrib-id><name-alternatives><name xml:lang="en"><surname>Filippov</surname><given-names>Dmitry S.</given-names></name><name xml:lang="ru"><surname>Филиппов</surname><given-names>Дмитрий Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD</p></bio><email>filippov.dmitry80@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0006-7063-1248</contrib-id><name-alternatives><name xml:lang="en"><surname>Panfilov</surname><given-names>Boris S.</given-names></name><name xml:lang="ru"><surname>Панфилов</surname><given-names>Борис Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD</p></bio><email>panfilov_b_s@staff.sechenov.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0003-6481-6017</contrib-id><name-alternatives><name xml:lang="en"><surname>Kazumova</surname><given-names>Aglaya B.</given-names></name><name xml:lang="ru"><surname>Казумова</surname><given-names>Аглая Борисовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD</p></bio><email>aglaya.kazumowa@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">The First Sechenov Moscow State Medical University</institution></aff><aff><institution xml:lang="ru">Первый Московский государственный медицинский университет имени И.М. Сеченова</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2025-11-22" publication-format="electronic"><day>22</day><month>11</month><year>2025</year></pub-date><pub-date date-type="pub" iso-8601-date="2025-12-23" publication-format="electronic"><day>23</day><month>12</month><year>2025</year></pub-date><volume>29</volume><issue>6</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>453</fpage><lpage>460</lpage><history><date date-type="received" iso-8601-date="2025-09-23"><day>23</day><month>09</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-10-16"><day>16</day><month>10</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Эко-Вектор</copyright-statement><copyright-year>2025</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/" start_date="2028-12-23"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://eco-vector.com/for_authors.php#07</ali:license_ref></license></permissions><self-uri xlink:href="https://rjdentistry.com/1728-2802/article/view/690526">https://rjdentistry.com/1728-2802/article/view/690526</self-uri><abstract xml:lang="en"><p><bold>BACKGROUND</bold><bold>: </bold>Surface-quality control of dental materials used in prosthodontics remains essential because reducing alterations in the microtopography of prosthetic components lowers microbial adhesion in the oral cavity and helps prevent inflammatory conditions.</p> <p><bold>AIM</bold><bold>: </bold>This work aimed to assess the surface quality of thermoplastic and acrylic polymer materials after final polishing and to compare their microlevel characteristics using scanning electron microscopy.</p> <p><bold>METHODS</bold><bold>: </bold>The study was conducted at First Sechenov Moscow State Medical University. Four contemporary polymer materials (4 samples per material) were evaluated after standardized surface polishing. A Tescan Vega 3 SBU scanning electron microscope (Tescan, Czech Republic) equipped with an Inca X-act energy-dispersive spectrometer (Oxford Instruments, United Kingdom) was used. In addition, a visual macro-assessment of the sample surfaces was performed.</p> <p><bold>RESULTS:<italic> </italic></bold>The thermoplastic polyetheretherketone material Dentokeep PEEK (PEEKCHINA, China) demonstrated the fewest surface defects, including minimal roughness and particulate inclusions, particularly in polished samples. Acrylic polymers exhibited the highest defect density, with pronounced roughness and delamination of the superficial layer.</p> <p><bold>CONCLUSION: </bold>Taking into account their favorable microtopographic characteristics, polished thermoplastic materials, especially polyetheretherketone, may be recommended for prioritized use in clinical prosthodontics, in contrast to acrylic polymers.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Обоснование. </bold>Контроль качества поверхности стоматологических материалов в ортопедической стоматологии не теряет актуальности, так как снижение количества изменений микрорельефа ортопедических конструкций позволяет уменьшить микробную адгезию в полости рта и тем самым предотвратить развитие воспалительных заболеваний.</p> <p><bold>Цель.</bold> Изучить качество поверхности термопластичных и акриловых полимеров после окончательной обработки, сравнивая их на микроуровне с помощью сканирующего электронного микроскопа.</p> <p><bold>Методы.</bold> Исследование проводили на базе Первого Московского государственного медицинского университета имени И.М. Сеченова. Сравнивали образцы современных полимерных материалов (4 материала по 4 образца) после полировки поверхности. Использовали растровый электронный микроскоп Tescan Vega 3 SBU (Tescan, Чехия) с энергодисперсионным спектрометром Inca X-act (Oxford Instruments, Великобритания). Кроме того, выполняли визуальную макрооценку поверхности образцов.</p> <p><bold>Результаты.</bold> Наименьшее количество дефектов в виде шероховатости и вкраплений было обнаружено на поверхности термопластического полимера полиэфирэфиркетона Dentokeep Peek (PEEKCHINA, Китай), особенно у полированного образца, наибольшее количество дефектов в виде шероховатости, расслоения поверхностного слоя — у акриловых полимеров.</p> <p><bold>Заключение.</bold> С учётом хороших показателей микрорельефа полированные образцы термопластических материалов могут быть рекомендованы к приоритетному применению в стоматологии (в отличие от акриловых).</p></trans-abstract><kwd-group xml:lang="en"><kwd>thermoplastic dental materials</kwd><kwd>acrylic materials</kwd><kwd>prosthodontic appliances</kwd><kwd>scanning electron microscopy</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>термопластические стоматологические материалы</kwd><kwd>акриловые материалы</kwd><kwd>ортопедическая конструкция</kwd><kwd>сканирующая электронная микроскопия</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Giti R, Dabiri S, Motamedifar M, Derafshi R. 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