<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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">medjournal</journal-id><journal-title-group><journal-title xml:lang="ru">Медицинский журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Medical Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1818-426X</issn><publisher><publisher-name>Белорусский государственный медицинский университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.51922/1818-426X.2026.2.87</article-id><article-id custom-type="elpub" pub-id-type="custom">medjournal-428</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>ОРИГИНАЛЬНЫЕ НАУЧНЫЕ ПУБЛИКАЦИИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL SCIENTIFIC PUBLICATIONS</subject></subj-group></article-categories><title-group><article-title>Возрастная динамика толщины кортикальной пластинки нижней челюсти в области первых и вторых временных моляров: данные конусно-лучевой компьютерной томографии</article-title><trans-title-group xml:lang="en"><trans-title>Age-related dynamics of the cortical plate thickness of the mandible in the area of the first and second primary molars: data from cone beam computed tomography</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>Попруженко</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Papruzhenka</surname><given-names>T. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</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>Быкова</surname><given-names>У. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Bykova</surname><given-names>U. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p><p> </p></bio><bio xml:lang="en"><p>Minsk</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>УО «Белорусский государственный медицинский университет»</institution></aff><aff xml:lang="en"><institution>Belarusian State Medical University</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>УЗ «7-я городская стоматологическая поликлиника»</institution></aff><aff xml:lang="en"><institution>7th City Dental Clinic</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>23</day><month>05</month><year>2026</year></pub-date><volume>0</volume><issue>2</issue><fpage>87</fpage><lpage>93</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Попруженко Т.В., Быкова У.О., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Попруженко Т.В., Быкова У.О.</copyright-holder><copyright-holder xml:lang="en">Papruzhenka T.V., Bykova U.O.</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://medjournal.ejournal.by/jour/article/view/428">https://medjournal.ejournal.by/jour/article/view/428</self-uri><abstract><p>Толщина кортикальной пластинки нижней челюсти часто упоминается как фактор, ограничивающий эффективность инфильтрационной анальгезии пульпы; принято считать, что толщина пластинки тем выше, чем дистальнее расположен зуб и чем старше ребенок, однако эта версия требует верификации.</p><sec><title>Цель исследования</title><p>Цель исследования: оценить толщину вестибулярной кортикальной пластинки в проекции верхушки дистального корня первого и второго временного моляра у детей в возрасте 5, 6, 7, 8, 9 и 10 лет с использованием архивных конусно-лучевых компьютерных томограмм (КЛКТ).</p></sec><sec><title>Материал и методы</title><p>Материал и методы. В архивных КЛКТ 81 ребенка шести возрастных групп проведены измерения изображений в области 123 первых и 152 вторых временных моляров; результаты обработаны методами непараметрической (Манна-Уитни, Спирмена) и параметрической (тест Стъюдента) статистики.</p></sec><sec><title>Результаты</title><p>Результаты. Показатели толщины изображений кортикальной пластинки варьируют от 1,34 мм до 2,10 мм (M ± SD = 1,85 ± 0,09 мм); показатели вторых временных моляров статистически не отличаются от таковых первых временных моляров ни в одной возрастной группе; показатели снижаются в возрасте от 5 до 10 лет в области как первых (r = –0,74; p &lt; 0,01), так и вторых (r = –0,73; p &lt; 0,01) моляров.</p></sec><sec><title>Выводы</title><p>Выводы. По данным конусно-лучевой компьютерной томографии показатели толщины вестибулярной кортикальной пластинки нижней челюсти в области верхушек корней первого и второго временных моляров у детей одного возраста статистическине различаются, в период с 5 до 10 лет – снижаются.</p></sec></abstract><trans-abstract xml:lang="en"><p>Mandibular cortical plate thickness is frequently cited as a factor limiting the efficacy of pulpal infiltration anesthesia. It is generally assumed that cortical thickness increases with more distal tooth positioning and advancing age in children; however, this assumption requires empirical validation.</p><sec><title>Objective</title><p>Objective. To evaluate the buccal cortical plate thickness at the level of the distal root apex of the first and second primary molars in children aged 5, 6, 7, 8, 9, and 10 years using archived cone-beam computed tomography (CBCT) scans.</p></sec><sec><title>Materials and Methods</title><p>Materials and Methods. Archived CBCT scans of 81 children, divided into six age groups, were analyzed. Measurements were performed on 123 first and 152 second primary molars. Statistical analysis was conducted using non-parametric (Mann-Whitney U test, Spearman’s rank correlation) and parametric (Student’s t-test) methods.</p></sec><sec><title>Results</title><p>Results. Cortical thickness values ranged from 1.3 mm to 2.10 mm (Mean ± SD = 1.85 ± 0.09 mm. No statistically significant differences were observed between the first and second primary molars in any age group. Notably, cortical thickness significantly decreased between the ages of 5 and 10 years in the regions of both the first (r = –0.74; p &lt; 0.01) and second (r = –0.73; p &lt; 0.01) molars.</p></sec><sec><title>Conclusions</title><p>Conclusions. According to CBCT data, the buccal cortical plate thickness at the root apices of the first and second primary molars does not differ significantly between children of the same age. Furthermore, this thickness decreases significantly in children during the period from 5 to 10 years of age.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>временные моляры</kwd><kwd>нижняя челюсть</kwd><kwd>толщина кортикальной пластинки</kwd><kwd>конусно-лучевая компьютерная томография</kwd></kwd-group><kwd-group xml:lang="en"><kwd>primary molars</kwd><kwd>mandible</kwd><kwd>cortical plate thickness</kwd><kwd>cone-beam computed tomography</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Malamed, S. F. Handbook of Local Anesthesia / S. F. Malamed. – 7th ed. – St. Louis: Mosby, 2019. – 464 p.</mixed-citation><mixed-citation xml:lang="en">Malamed, S. F. Handbook of Local Anesthesia / S. F. Malamed, – 7th ed. – St. Louis: Mosby, 2019. – 464 p.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Chitre, A. P. Manual of local anesthesia in dentistry / A. P. Chitre. – 2nd ed. – St. Louis: Jaypee brothers medical publishers ltd., 2010. – 374 p.</mixed-citation><mixed-citation xml:lang="en">Chitre, A. P. Manual of local anesthesia in dentistry / A. P. Chitre. – 2nd ed. – St. Louis: Jaypee brothers medical publishers ltd., 2010. – 374 p.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Wright, G. Z. Child Management in Dentistry / G. Z. Wright, P. E. Starkey, D. E. Gardner. – Bristol: Wright, 1987. – 241 p.</mixed-citation><mixed-citation xml:lang="en">Wright, G. Z. Child Management in Dentistry / G. Z. Wright, P. E. Starkey, D. E. Gardner. – Bristol: Wright, 1987. – 241 p.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">X-ray and anatomical features of the lower jaw alveolar cortical layer in children / Y. Vasil’ev, Y. Enina, S. Dydykin [et al.] // Annals of Anatomy. – 2023. – Vol. 245. – P. 1–8. – doi: 10.1016/j.aanat.2022.152005.</mixed-citation><mixed-citation xml:lang="en">X-ray and anatomical features of the lower jaw alveolar cortical layer in children / Y. Vasil’ev, Y. Enina, S. Dydykin [et al.] // Annals of Anatomy. – 2023. – Vol. 245. – P. 1–8. – doi: 10.1016/j.aanat.2022.152005.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Mathewson, R. J. Fundamentals of pediatric dentistry / R. J. Mathewson, R. E. Primosch. – 3rd ed. – Chicago: Quintessence, 1995. – 400 p.</mixed-citation><mixed-citation xml:lang="en">Mathewson, R. J. Fundamentals of pediatric dentistry / R. J. Mathewson., R. E. Primosch. – 3rd ed. – Chicago: Quintessence, 1995. – 400 p.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">The effectiveness of infiltration anesthesia in the mandibular primary molar region // G. Z. Wright, S. J. Weinberger, R. Marti [et al.] // Pediatric Dentistry. – 1991. – Vol. 13, № 5. – P. 278–283.</mixed-citation><mixed-citation xml:lang="en">The effectiveness of infiltration anesthesia in the mandibular primary molar region // G. Z. Wright, S. J. Weinberger, R. Marti [et al] // Pediatric Dentistry. – 1991. – Vol. 13, № 5. – P. 278–283.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Flanagan, D. F. The effectiveness of articaine in mandibular facial infiltrations / D. F. Flanagan // Local and Regional Anesthesia. – 2016. – Vol. 18, № 9. – P. 1–6. – doi: 10.2147/LRA.S 94647.</mixed-citation><mixed-citation xml:lang="en">Flanagan, D. F. The effectiveness of articaine in mandibular facial infiltrations / D. F. Flanagan // Local and Regional Anesthesia. – 2016. – Vol. 18, № 9. – P. 1–6. – doi: 10.2147/LRA. S 94647.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Fractal dimension, lacunarity, and cortical thickness in the mandible: Analyzing differences between healthy men and women with cone-beam computed tomography / I. G. Santos, F. Ramos de Faria, M. J. da Silva Campos [et al.] / Imaging Science in Dentistry. – 2023. – Vol. 53, № 2. – P. 153–159. – doi: 10.5624/isd.20230042.</mixed-citation><mixed-citation xml:lang="en">Fractal dimension, lacunarity, and cortical thickness in the mandible: Analyzing differences between healthy men and women with cone-beam computed tomography / I. G. Santos, F. Ramos de Faria, M. J. da Silva Campos [et al.] / Imaging Science in Dentistry. – 2023. – Vol. 53, № 2. – P. 153–159. – doi: 10.5624/isd.20230042.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Local anesthetics in pediatric dental practice / T. G. Jayakaran, R. Vignesh, P. Shankar // Research Journal of Pharmacy and Technology. – 2019. – Vol. 12, № 8. – P. 4066– 4070. doi.org/10.5958/0974-360X.2019.00700.5.</mixed-citation><mixed-citation xml:lang="en">Local anesthetics in pediatric dental practice / T. G. Jayakaran, R. Vignesh, P. Shankar // Research Journal of Pharmacy and Technology. – 2019. – Vol. 12, № 8. – P. 4066–4070. – doi: org/10.5958/0974-360X.2019.00700.5.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Миронович, Я. И. Диагностические возможности КЛКТ у пациентов с рецессией десны / Я. И. Миронович, А. С. Соломевич // Инновации в медицине и фармации-2021: материалы дистанцион. науч.-практ. конф. студентов и молодых ученых, Минск, 28–30 ноября 2021 г. / редколл.: С. П. Рубникович [и др.]. – Мн., 2021. – С. 76–179.</mixed-citation><mixed-citation xml:lang="en">Mironovich, Ya. I. Diagnosticheskiye vozmozhnosti KLKT u patsiyentov s retsessiyey desny [Diagnostic capabilities of CBCT in patients with gingival recession] / Ya. I. Mironovich, A. S. Solomevich // Innovatsii v meditsine i farmatsii-2021: materialy distantsion. nauch.-prakt. konf. studentov i molodykh uchenykh, Minsk, 28–30 noyabrya 2021 g. / redkoll.: S. P. Rubnikovich [et al.]. – Minsk, 2021. – S. 76–179 [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Cortical bone thickness in dentate and edentulous human cadavers / A. Katranji, K. Misch, H. L. Wang // Journal of Periodontology. − 2007. – Vol. 78, № 5. – P. 874–878. – doi: 10.1902/jop.2007.060342.</mixed-citation><mixed-citation xml:lang="en">Cortical bone thickness in dentate and edentulous human cadavers / A. Katranji, K. Misch, H. L. Wang // Journal of Periodontology. – 2007. – Vol. 78, № 5. – P. 874–878. – doi: 10.1902/jop.2007.060342.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Distance between external cortical bone and mandibular canal for harvesting ramus graft: a human cadaver study / D. J. Leong, J. Li, I. Moreno [et al.] // Journal of Periodontology. – 2010. – Vol. 81, № 2. – P. 239–243. – doi: org/10.1902/jop. 2009.090417.</mixed-citation><mixed-citation xml:lang="en">Distance between external cortical bone and mandibular canal for harvesting ramus graft: a human cadaver study / D. J. Leong, J. Li, I. Moreno [et al.] // Journal of Periodontology. – 2010. – Vol. 81, № 2. – P. 239–243. – doi.org/10.1902/jop. 2009.090417.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Гавриленко, А. Б. Оценка точности измерений линейных параметров по КЛКТ при планировании ортодонтического лечения / А. Б. Гавриленко, Н. Д. Крутько // Актуальные проблемы современной медицины и фармации 2020: тез. докл. LXXIV Междунар. науч.-практ. конф. студентов и молодых ученых, 15–17 апреля 2020 г., Минск / редколл.: А. В. Сикорский [и др.]. – Мн., 2020. – С. 786–788.</mixed-citation><mixed-citation xml:lang="en">Gavrilenko, A. B. Otsenka tochnosti izmereniy lineynykh parametrov po KLKT pri planirovanii ortodonticheskogo lecheniya [Evaluation of the accuracy of linear parameter measurements using CBCT in orthodontic treatment planning] / A. B. Gavrilenko, N. D. Krut’ko // Aktual’nyye problemy sovremennoy meditsiny i farmatsii 2020 : tez. dokl. LXXIV Mezhdunar. nauch.-prakt. konf. studentov i molodykh uchenykh, 15–17 aprelya 2020 g., Minsk / redkoll.: A. V. Sikorskiy [et al.]. – Minsk, 2020. – S. 786–788 [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Accuracy and reliability of linear cephalometric measurements from cone-beam computed tomography scans of a dry human skull / M. Berco, P. H. Jr. Rigali, R. M. Miner [et al.] // American Journal of Orthodontics and Dentofacial Orthopedics. – 2009. – Vol. 136, № 17. – P. 1–9. – doi: 10.1016/j.ajodo.2008.08.021.</mixed-citation><mixed-citation xml:lang="en">Accuracy and reliability of linear cephalometric measurements from cone-beam computed tomography scans of a dry human skull / M. Berco, P. H. Jr. Rigali, R. M. Miner [et al.] // American Journal of Orthodontics and Dentofacial Orthopedics. – 2009. – Vol. 136, № 17. – P. 1–9. – doi: 10.1016/j.ajodo.2008.08.021.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Can male patient's age affect the cortical bone thickness of jawbone for dental implant placement? A cohort study / S. H. Wang, Y. C. Ko, M. T. Tsai [et al.] // International Journal of Environmental Research and Public Health. – 2021. – Vol. 18, № 18. – P. 1–10. – doi: 10.3390/ijerph18084284.</mixed-citation><mixed-citation xml:lang="en">Can male patient’s age affect the cortical bone thickness of jawbone for dental implant placement? A cohort study / S. H. Wang, Y. C. Ko, M. T. Tsai [et al.] // International Journal of Environmental Research and Public Health. – 2021. – Vol. 18, № 18. – P. 1–10. – doi: 10.3390/ijerph18084284.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Anthropometric analysis of the human mandibular cortical bone as assessed by cone-beam computed tomography / D. Swasty, J. S. Lee, J. C. Huang [et al.] // Journal of Oral and Maxillofacial Surgery. – 2009. – Vol. 67, № 3. – P. 491–500. – doi: 10.1016/j.joms.2008.06.089.</mixed-citation><mixed-citation xml:lang="en">Anthropometric analysis of the human mandibular cortical bone as assessed by cone-beam computed tomography / D. Swasty, J. S. Lee, J. C. Huang [et al.] // Journal of Oral and Maxillofacial Surgery. – 2009. – Vol. 67, № 3. – P. 491–500. – doi: 10.1016/j.joms.2008.06.089.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">A cone beam computed tomography (CBCT) study of buccal plate thickness of the maxillary and mandibular posterior dentition / K. E. Temple, J. Schoolfield, M. E. Noujeim [et al.] // Clin Oral Implants Research. – 2016. – Vol. 27, № 9. – P. 1072–1 078. – doi: 10.1111/clr.12688.</mixed-citation><mixed-citation xml:lang="en">A cone beam computed tomography (CBCT) study of buccal plate thickness of the maxillary and mandibular posterior dentition / K. E. Temple, J. Schoolfield, M. E. Noujeim [et al.] // Clin Oral Implants Research. – 2016. – Vol. 27, № 9. – P. 1072–1078. – doi: 10.1111/clr.12688.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Попруженко, Т. В. Параметры плотности кортикальной пластинки нижней челюсти в области временных моляров у детей в возрасте от 5 до 10 лет / Т. В. Попруженко, У. О. Быкова // Стоматология. Эстететика. Инновации. – 2025 – Т. 9, № 1. – C. 88–93. – doi: org/10.34883/PI.2025.9.1.008.</mixed-citation><mixed-citation xml:lang="en">Popruzhenko, T. V. Parametry plotnosti kortikal’noy plastinki nizhney chelyusti v oblasti vremennykh molyarov u detey v vozraste ot 5 do 10 let [Parameters of the density of the cortical plate of the mandible in the area of temporary molars in children aged 5 to 10 years] / T. V. Popruzhenko, U. O. Bykova // Stomatologiya. Estetetika. Innovatsii. – 2025. – T. 9, № 1. – Р. 88–93. – doi.org/10.34883/PI.2025.9.1.008 [in Russian].</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Брилевич, О. В. Взаиморасположение зачатка второго премоляра и второго временного моляра в контексте эндодонтического лечения у детей в возрасте от трех до восьми лет / О. В. Брилевич, Т. В. Попруженко // Стоматология: наука и практика: материалы конф. «Утробинские чтения», посвящ. 70-летию Победы в Великой Отечественной войне 1941–1945 гг. / редколл.: А. В. Анохина [и др.]. – Казань, 2015. – С. 26–27.</mixed-citation><mixed-citation xml:lang="en">Brilevich, O. V. Vzaimoraspolozhenie zachatka vtorogo premolyara i vtorogo vremennogo molyara v kontekste e`ndodonticheskogo lecheniya u detej v vozraste ot trekh do vos`mi let [The relationship between the second premolar bud and the second primary molar in the context of endodontic treatment in children aged three to eight years] / O. V. Brilevich, T. V. Popruzhenko // Stomatologiya: nauka i praktika: materialy` konf. “Utrobinskie chteniya”, posvyashh. 70-letiyu Pobedy` v Velikoj Otechestvennoj vojne 1941–1945 gg. / redkoll.: A. V. Anokhina [et al.]. – Kazan`, 2015. – S. 26–27 [in Russian].</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
