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The role of root wall thickness in stress distribution in dentin after endodontic treatment
- Authors: Nekrasova E.A.1, Olesova E.2,3, Glazkova E.V.1, Olesov E.E.4
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Affiliations:
- State Research Center — Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency
- Федеральное государственное бюджетное образовательное учреждение высшего образования «Российский университет медицины» Министерства здравоохранения Российской Федерации
- Медико-биологический университет инноваций и непрерывного образования Федерального государственного бюджетного учреждения «Государственный научный центр - Федеральный медицинский биофизический центр имени А.И. Бурназяна» ФМБА России, Москва, Российская Федерация
- Federal Research and Clinical Center of Specialized Medical Care and Medical Technologies FMBA of Russia
- Section: Experimental and Theoretical Investigation
- Submitted: 30.05.2025
- Accepted: 23.06.2025
- Published: 09.07.2025
- URL: https://rjdentistry.com/1728-2802/article/view/681671
- DOI: https://doi.org/10.17816/dent681671
- ID: 681671
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Abstract
BACKGROUND: predicting possible complications in the form of fractures and fractures of the root of the tooth makes it relevant to study the distribution of stresses in the root of the tooth in different biomechanical circumstances, in particular, with changes in the magnitude of the functional load, its direction, as well as the dimensional and mechanical parameters of the tooth.
AIM: three-dimensional mathematical modeling of functional stresses in the root of the tooth depending on the thickness of the dentinal wall.
MATERIALS AND METHODS: using the mathematical program SolidWorks (Dassault Systems), an analysis of the magnitude and propagation of stresses in the root of a devitalized tooth under an inclined load of 30 ° with a force of 150 N. For the purposes of this study, the stresses in three tooth models were compared: with a root wall thickness of 1.0 mm, 1.5 mm and 2.0 mm. Integral stresses were analyzed, as well as tensile stresses propagating in the vertical, buccal-lingual and medio-distal directions.
RESULTS: a pattern of increasing stresses in the dentine of a devitalized tooth was obtained depending on a decrease in the thickness of the root wall. This pattern is especially evident when modeling the 1.0 mm thick root wall, where stresses become limiting for dentin strength. Stress distribution patterns show the localization of maximum values in the area of the tooth neck.
CONCLUSION: evidence of an increase in functional stresses in the dentine of a devitalized tooth with a decrease in the thickness of the root wall has been obtained. The main localization of maximum stresses was revealed – the tooth neck. It has been established that devitalized dentin is subject to stresses in excess of the ultimate strength at a root thickness of 1 mm.
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About the authors
Ekaterina A. Nekrasova
State Research Center — Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency
Email: ekaterina233@mail.ru
ORCID iD: 0000-0003-0380-0575
SPIN-code: 4291-2151
Russian Federation, Moscow
Emilia Olesova
Федеральное государственное бюджетное образовательное учреждение высшего образования «Российский университет медицины» Министерства здравоохранения Российской Федерации; Медико-биологический университет инноваций и непрерывного образования Федерального государственного бюджетного учреждения «Государственный научный центр - Федеральный медицинский биофизический центр имени А.И. Бурназяна» ФМБА России, Москва, Российская Федерация
Author for correspondence.
Email: emma.olesova@mail.ru
ORCID iD: 0000-0003-4511-6317
Russian Federation
Elena V. Glazkova
State Research Center — Burnasyan Federal Medical Biophysical Center of Federal Medical Biological Agency
Email: pozharskaya_lena@mail.ru
ORCID iD: 0000-0002-9825-4935
SPIN-code: 5304-9137
MD, Cand. Sci. (Medicine), Associate Professor
Russian Federation, 46 Zhivopisnaya street, 123098 MoscowEgor E. Olesov
Federal Research and Clinical Center of Specialized Medical Care and Medical Technologies FMBA of Russia
Email: olesov_georgiy@mail.ru
ORCID iD: 0000-0001-9165-2554
SPIN-code: 8924-3520
MD, Dr. Sci. (Medecine), Professor
Russian Federation, 28 Orekhovy blvd., 115682 MoscowReferences
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