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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Actual problems in dentistry</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Actual problems in dentistry</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Проблемы стоматологии</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="print">2077-7566</issn>
   <issn publication-format="online">2412-9461</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">40800</article-id>
   <article-id pub-id-type="doi">10.18481/2077-7566-20-16-4-130-135</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>ОРТОПЕДИЧЕСКАЯ СТОМАТОЛОГИЯ</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>ORTHOPEDIC  DENTISTRY</subject>
    </subj-group>
    <subj-group>
     <subject>ОРТОПЕДИЧЕСКАЯ СТОМАТОЛОГИЯ</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">COMPARATIVE EVALUATION OF THE DIMENSIONAL ACCURACY OF BRIDGE PROSTHESIS FRAMES MADE USING TRADITIONAL AND DIGITAL</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>СРАВНИТЕЛЬНАЯ ОЦЕНКА РАЗМЕРНОЙ ТОЧНОСТИ КАРКАСОВ МОСТОВИДНЫХ ПРОТЕЗОВ, ИЗГОТОВЛЕННЫХ С ПОМОЩЬЮ ТРАДИЦИОННЫХ И ЦИФРОВЫХ ТЕХНОЛОГИЙ</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5220-2032</contrib-id>
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Вокулова</surname>
       <given-names>Юлия Андреевна</given-names>
      </name>
      <name xml:lang="en">
       <surname>Vokulova</surname>
       <given-names>Yuliya Andreevna</given-names>
      </name>
     </name-alternatives>
     <email>vokulova@rambler.ru</email>
     <bio xml:lang="ru">
      <p>кандидат медицинских наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>candidate of medical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
    <contrib contrib-type="author">
     <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9539-3350</contrib-id>
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Жулев</surname>
       <given-names>Евгений Николаевич</given-names>
      </name>
      <name xml:lang="en">
       <surname>Zhulev</surname>
       <given-names>Evgenij Nikolaevich</given-names>
      </name>
     </name-alternatives>
     <email>Hrustalev54@mail.ru</email>
     <bio xml:lang="ru">
      <p>доктор медицинских наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>doctor of medical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Поликлиника № 2 ФТС России</institution>
     <city>Нижний Новгород</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Поликлиника № 2 ФТС России</institution>
     <city>Нижний Новгород</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">ФГБОУ ВО &quot;Приволжский исследовательский медицинский университет&quot; Минздрава России</institution>
     <city>Нижний Новгород</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Privolzhsky Research Medical University</institution>
     <city>Nizhny Novgorod</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2020-12-28T12:06:08+03:00">
    <day>28</day>
    <month>12</month>
    <year>2020</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2020-12-28T12:06:08+03:00">
    <day>28</day>
    <month>12</month>
    <year>2020</year>
   </pub-date>
   <volume>16</volume>
   <issue>4</issue>
   <fpage>130</fpage>
   <lpage>135</lpage>
   <history>
    <date date-type="received" iso-8601-date="2020-12-03T12:06:08+03:00">
     <day>03</day>
     <month>12</month>
     <year>2020</year>
    </date>
    <date date-type="accepted" iso-8601-date="2020-12-10T12:06:08+03:00">
     <day>10</day>
     <month>12</month>
     <year>2020</year>
    </date>
   </history>
   <self-uri xlink:href="https://dental-press.ru/en/nauka/article/40800/view">https://dental-press.ru/en/nauka/article/40800/view</self-uri>
   <abstract xml:lang="ru">
    <p>Предмет. Современные цифровые технологии позволяют в значительной степени автоматизировать процесс создания мостовидных протезов. Вначале получают цифровые изображения зубных рядов пациента, затем виртуально моделируют будущий протез и изготавливают его субтрактивным методом с помощью фрезерно-шлифовальных станков либо аддитивным методом с помощью 3D-принтера. Для клинической оценки качества ортопедических несъемных конструкций, изготовленных с применением цифровых методов, необходимо оценить размерную точность этих конструкций.&#13;
Цель — провести сравнительную оценку размерной точности каркасов мостовидных протезов, изготовленных с помощью современных цифровых технологий и традиционным методом литья.&#13;
Методология. Для изучения размерной точности каркасов мостовидных протезов использовали внутриротовой лазерный сканер iTero Cadent, 3D-принтер Asiga Max UV, CAD/CAM-систему KaVo ARCTICA, программное обеспечение DentalCAD 2.2 Valletta и компьютерную программу MeshLab. Для статистического анализа полученных данных применяли H-критерий Краскела-Уоллиса и U-критерий Манна-Уитни.&#13;
Результаты. Все цифровые методики изготовления каркасов мостовидных протезов отличаются от традиционного метода литья с уровнем значимости p&lt;0,05 по признаку размерной точности. Каркасы мостовидных протезов, изготовленных субтрактивным методом, обладают большей размерной точностью по сравнению с каркасами, полученными с применением аддитивных технологий. Статистических различий в размерной точности фрезерованных титановых и циркониевых каркасов мостовидных протезов не обнаружено.&#13;
Выводы. На основании полученных данных установлено, что каркасы мостовидных протезов, изготовленные с помощью современных цифровых технологий, обладают большей размерной точностью (среднее значение медианного расстояния фрезерованных циркониевых каркасов 0,03067±0,001234 мм, фрезерованных титановых каркасов 0,03032±0,002698 мм, каркасов, изготовленных с применением аддитивных технологий, 0,03686±0,003068 мм) по сравнению с каркасами мостовидных протезов, изготовленными традиционным методом литья (среднее значение медианного расстояния 0,04342±0,003722 мм), с уровнем значимости p&lt;0,05 (U-критерий Манна-Уитни =0, р=0,002).</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>Subject. Modern digital technologies make it possible to automate the process of creating bridges to a large extent. First, digital images of the patient's dentition are obtained, then the future prosthesis is virtually modeled and manufactured using a subtractive method using milling and grinding machines or an additive method using a 3D printer. For clinical evaluation of the quality of orthopedic fixed structures made using digital methods, it is necessary to evaluate their dimensional accuracy.&#13;
The aim is to conduct a comparative assessment of the dimensional accuracy of bridge prosthesis frames made using modern digital technologies and traditional casting method.&#13;
Methodology. The intraoral laser scanner iTero Cadent, the 3D printer Asiga Max UV, the CAD/CAM system KaVo ARCTICA, the software DentalCAD 2.2 Valletta and the computer program MeshLab were used to study the dimensional accuracy of the bridge frames. The Kruskal-Wallis H-test and the Mann-Whitney U-test were used for statistical analysis of the data obtained.&#13;
Results. All digital methods of manufacturing bridge frames are distinguishable from the traditional casting method with a significance level of p&lt;0.05 on the basis of dimensional accuracy. The frames of bridge prostheses made by the subtractive method have a higher dimensional accuracy compared to the frames obtained using additive technologies. There were no statistical differences in the dimensional accuracy of milled titanium and zirconium bridge frames.&#13;
Conclusions. Based on the data obtained, we concluded that the bridge frames made using modern digital technologies have a higher dimensional accuracy (the average value of the median distance of milled zirconium frames is 0,03067 ± 0,001234 mm, milled titanium frames are 0,03032 ± 0,002698 mm, frames made using additive technologies are 0,03686 ± 0,003068 mm) compared to the bridge frames made by the traditional casting method (the average value of the median distance 0,04342 ± 0,003722 mm), with a significance level of p&lt;0,05 (U-Mann-Whitney criterion =0, p=,002).</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>цифровые технологии в стоматологии</kwd>
    <kwd>цифровые оттиски</kwd>
    <kwd>CAD/CAM</kwd>
    <kwd>внутриротовой сканер</kwd>
    <kwd>3D-печать</kwd>
    <kwd>3D-принтер</kwd>
    <kwd>мостовидные протезы</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>digital technologies in dentistry</kwd>
    <kwd>digital impressions</kwd>
    <kwd>CAD/CAM</kwd>
    <kwd>intraoral scanner</kwd>
    <kwd>3D printing</kwd>
    <kwd>3D printer</kwd>
    <kwd>bridges</kwd>
   </kwd-group>
  </article-meta>
 </front>
 <body>
  <p></p>
 </body>
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