Stress-strain state of implant-supported restorations in tooth replacement
- Authors: Bersanova M.R.1, Olesova V.N.2, Zaslavsky R.S.2, Bersanov R.U.1, Yarilkina S.P.2
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Affiliations:
- Kadyrov Chechen State University
- A.I. Burnazyan State Medical Research Center of the FMBA of Russia
- Issue: Vol 28, No 4 (2024)
- Pages: 432-438
- Section: Digital Dentistry
- URL: https://journals.rcsi.science/1728-2802/article/view/281608
- DOI: https://doi.org/10.17816/dent629415
- ID: 281608
Cite item
Abstract
Background: Dental implant therapy may be associated with breakage and deformation of implant-supported restorations, necessitating an assessment of their stress-strain state when applying a load.
Aim: To compare the stress-strain state of implants with their respective fixed restorations in tooth replacement.
Materials and Methods: A 3D mathematical model of the posterior mandible with three missing teeth was used to assess the stress-strain state for the following dental restoration options: three implant-supported crowns; a two-implant-supported bridge; or a bridge supported by tooth and implant. A 150 N load was applied to the central part of a restoration in both vertical and oblique directions to compare maximum stress values and their distribution.
Results: Oblique load was found to have a negative impact on stress intensity and distribution (471.7 MPa vs 90.7 MPa with vertical load for three implants). The most heavily loaded parts of restorations were identified: the border of the crown and the implant connection zone. A homogeneous stress distribution from a bridge to the two supporting implants was observed, along with a decrease in stress when using a bridge rather than three implant-supported crowns (160.0 MPa vs 16.1 MPa). In contrast, the load on the supporting implant increased when a bridge supported by tooth and implant was used (1,053.5 MPa with oblique load).
Conclusion: Compared to three implants replacing three missing teeth, a two-implant-supported bridge decreases stress on the implants and their respective restoration. Replacing one supporting implant with a tooth increases stress on the implant to the ultimate strength of titanium alloy in the abutment.
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##article.viewOnOriginalSite##About the authors
Makka R. Bersanova
Kadyrov Chechen State University
Author for correspondence.
Email: bersanova99@bk.ru
ORCID iD: 0009-0004-6150-148X
Russian Federation, Grozny
Valentina N. Olesova
A.I. Burnazyan State Medical Research Center of the FMBA of Russia
Email: olesova@implantat.ru
ORCID iD: 0000-0002-3461-9317
SPIN-code: 6851-5618
MD, Dr. Sci. (Medicine), Professor
Russian Federation, MoscowRoman S. Zaslavsky
A.I. Burnazyan State Medical Research Center of the FMBA of Russia
Email: mbufmbc@mail.ru
ORCID iD: 0000-0002-2217-8745
SPIN-code: 5826-0269
Russian Federation, Moscow
Ruslan U. Bersanov
Kadyrov Chechen State University
Email: bersanovr@mail.ru
ORCID iD: 0009-0005-1557-7130
SPIN-code: 3746-6283
MD, Dr. Sci. (Medicine), Professor
Russian Federation, GroznySvetlana P. Yarilkina
A.I. Burnazyan State Medical Research Center of the FMBA of Russia
Email: yarilkina@mail.ru
ORCID iD: 0000-0001-6182-3965
SPIN-code: 8663-0213
MD, Cand. Sci. (Medicine), Associate Professor
Russian Federation, MoscowReferences
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