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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">707438</article-id><article-id pub-id-type="doi">10.17816/dent707438</article-id><article-id pub-id-type="edn">UQUMCC</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">Spectrometric study of the composition of metal-containing orthodontic appliances: a cross-sectional laboratory study</article-title><trans-title-group xml:lang="ru"><trans-title>Спектрометрическое изучение состава металлосодержащей ортодонтической аппаратуры: одномоментное лабораторное исследование</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9165-2554</contrib-id><contrib-id contrib-id-type="spin">8924-3520</contrib-id><name-alternatives><name xml:lang="en"><surname>Olesov</surname><given-names>Egor E.</given-names></name><name xml:lang="ru"><surname>Олесов</surname><given-names>Егор Евгеньевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine), Professor</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор</p></bio><email>olesov_georgiy@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8598-0527</contrib-id><contrib-id contrib-id-type="spin">4802-9240</contrib-id><name-alternatives><name xml:lang="en"><surname>Radzishevsky</surname><given-names>Boris M.</given-names></name><name xml:lang="ru"><surname>Радзишевский</surname><given-names>Борис Михайлович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>3make@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5878-6761</contrib-id><contrib-id contrib-id-type="spin">5248-5572</contrib-id><name-alternatives><name xml:lang="en"><surname>Fazylova</surname><given-names>Tatyana A.</given-names></name><name xml:lang="ru"><surname>Фазылова</surname><given-names>Татьяна Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>tfazylova@yandex.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-5208-458X</contrib-id><contrib-id contrib-id-type="spin">5240-6717</contrib-id><name-alternatives><name xml:lang="en"><surname>Dikopov</surname><given-names>Arseniy D.</given-names></name><name xml:lang="ru"><surname>Дикопов</surname><given-names>Арсений Дмитриевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>dr.dikopov@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Federal Research and Clinical Center of Specialized Medical Care and Medical Technologies FMBA of Russia</institution></aff><aff><institution xml:lang="ru">Федеральный научно-клинический центр специализированных видов медицинской помощи и медицинских технологий Федерального медико-биологического агентства</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">State Scientific Center of the Russian Federation — Federal Medical Biophysical Center named after A.I. Burnazyan</institution></aff><aff><institution xml:lang="ru">Государственный научный центр Российской Федерации — Федеральный медицинский биофизический центр имени А.И. Бурназяна</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2026-07-03" publication-format="electronic"><day>03</day><month>07</month><year>2026</year></pub-date><pub-date date-type="pub" iso-8601-date="2026-09-21" publication-format="electronic"><day>21</day><month>09</month><year>2026</year></pub-date><volume>30</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>186</fpage><lpage>192</lpage><history><date date-type="received" iso-8601-date="2026-05-14"><day>14</day><month>05</month><year>2026</year></date><date date-type="accepted" iso-8601-date="2026-06-16"><day>16</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-year>2026</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="2029-09-21"/><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://rjdentistry.com/1728-2802/article/view/707438">https://rjdentistry.com/1728-2802/article/view/707438</self-uri><abstract xml:lang="en"><p><bold>BACKGROUND:</bold> Recent studies have revealed a rather high prevalence of electric potential differences between metallic inclusions in the oral cavity, including in the presence of metal-containing orthodontic appliances. Due to the lack of precise information in official sources on the composition of structural materials used in orthodontic appliances and the difficulty of theoretical calculation of electrochemical contact potentials, an analysis of the alloy composition of appliances from different manufacturers is necessary.</p> <p><bold>AIM:</bold> To determine and analyze the elemental composition of metal-containing components of modern orthodontic appliances (brackets, archwires, implants) from various manufacturers available on the Russian market using energy-dispersive spectrometry.</p> <p><bold>METHODS:</bold> The sample comprised 16 metal-containing components of domestic and imported orthodontic appliances used in Russia: 8 orthodontic archwires, 5 bracket samples, and 3 orthodontic implants. Elemental analysis was performed using an energy-dispersive X-ray detector (EDX) in a dualbeam scanning electron microscope FEI Helios NanoLab 660 (FEI Company, USA). Quantitative data (element content, weight %) are presented as arithmetic means from three measurement points per sample. Statistical comparison was not performed due to the descriptive nature of the study.</p> <p><bold>RESULTS:</bold> This observational study (<italic>n</italic> = 16) revealed significant diversity in the composition of widely used metal-containing orthodontic structures (12 metallic elements, including iron, titanium, chromium). Notably, high nickel (up to 13.9 wt%) and aluminum (up to 10.9 wt%) content was detected for the first time in some implant samples.</p> <p><bold>CONCLUSION:</bold> The problem of controlling the electrochemical activity of metallic orthodontic appliances remains relevant due to the high prevalence of electric potential differences in the oral cavity of patients wearing such devices. Contact between dissimilar metals (brackets, archwires, implants) may trigger electrochemical reactions. The obtained data substantiate the need for a responsible, individualized selection of orthodontic appliances and consideration of their elemental composition during treatment planning. Study limitations: small sample size (<italic>n</italic> = 16).</p></abstract><trans-abstract xml:lang="ru"><p><bold>Обоснование.</bold> Ряд исследований последних лет выявляет довольно высокую распространённость разности электропотенциалов металлических включений во рту, в том числе при наличии металлосодержащей ортодонтической аппаратуры. В связи с отсутствием в официальных источниках точных сведений о составе конструкционных материалов ортодонтической аппаратуры и затруднительности теоретического расчёта электрохимических контактных потенциалов необходим анализ содержания сплавов металлов в аппаратуре разных производителей.</p> <p><bold>Цель.</bold> Определить и проанализировать элементный состав металлосодержащих компонентов современной ортодонтической аппаратуры (брекетов, дуг, имплантатов) различных производителей, представленной на российском рынке, методом энергодисперсионной спектрометрии.</p> <p><bold>Методы.</bold> Выборка состояла из 16 образцов металлосодержащих компонентов ортодонтических аппаратов отечественного и импортного производства, применяемых в России: 8 ортодонтических дуг, 5 образцов брекетов и 3 ортодонтических имплантата. Элементный анализ проводили с помощью EDX (энергодисперсионный рентгеновский детектор) в двухлучевом растровом электронном микроскопе FEI Helios NanoLab 660 (FEI Company, США). Количественные показатели (содержание элементов, весовые проценты — вес. %) представлены как среднее арифметическое по трём точкам измерения на каждом образце. Статистическое сравнение не проводили ввиду описательного характера исследования.</p> <p><bold>Результаты.</bold> Проведённое наблюдательное исследование (<italic>n</italic> = 16) выявило значительное разнообразие состава широко применяемых ортодонтических металлосодержащих конструкций (12 металлических элементов, включая железо, титан, хром). Впервые выявлено высокое содержание никеля (до 13,9 вес. %) и алюминия (до 10,9 вес. %) в некоторых образцах имплантатов.</p> <p><bold>Заключение. </bold>Проблема контроля электрохимической активности металлической ортодонтической аппаратуры остаётся актуальной в связи с высокой распространённостью разности электропотенциалов во рту у носителей таких конструкций. Контакт разнородных металлов (брекетов, дуг, имплантатов) может провоцировать электрохимические реакции. Полученные данные обосновывают необходимость ответственного индивидуализированного подбора ортодонтической аппаратуры и учёта её элементного состава при планировании лечения. Ограничения исследования — небольшой размер выборки.</p></trans-abstract><kwd-group xml:lang="en"><kwd>orthodontic appliances</kwd><kwd>elemental composition</kwd><kwd>metals</kwd><kwd>spectrometry</kwd><kwd>energy-dispersive analysis</kwd><kwd>cross-sectional study</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>ортодонтическая аппаратура</kwd><kwd>элементный состав</kwd><kwd>металлы</kwd><kwd>спектрометрия</kwd><kwd>энергодисперсионный анализ</kwd><kwd>одномоментное исследование</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Manin OI, Rudakova AM, Manina EI, Kerimov YuT. Assessment of the condition of dental prostheses in patients with a history of post-COVID syndrome who present with complaints characteristic of intolerance to prosthetic materials. Russian Journal of Stomatology. 2025;18(2):109–111. (In Russ.) 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