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Effect of different restorative design and materials on stress distribution in cracked teeth: a finite element analysis study

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Title: Effect of different restorative design and materials on stress distribution in cracked teeth: a finite element analysis study
Authors: Ting Liu, Yinghao Huang, Yue Li, Jiali Meng, Yajing Liu, Yuan Wei, Yequan Huang, Qian Zhou, Weidong Yang, Fuhua Yan, Xiang Wang, Yanan Zhu
Source: BMC Oral Health, Vol 25, Iss 1, Pp 1-17 (2025)
Publisher Information: BMC, 2025.
Publication Year: 2025
Collection: LCC:Dentistry
Subject Terms: Finite element analysis, Cracked tooth, Restoration design, Occlusal veneer, Mechanical properties, Dentistry, RK1-715
More Details: Abstract Objectives To compare the stress distribution and crack propagation in cracked mandibular first molar restored with onlay, overlay, and two types of occlusal veneers using two different CAD/CAM materials by Finite Element Analysis (FEA). Materials and methods A mandibular first molar was digitized using a micro CT scanning system in 2023. Three-dimensional dynamic scan data were transformed, and a 3D model of a cracked tooth was generated. Finite element models of four different models (onlay, overlay, and two types of occlusal veneer restored teeth) were designed. Two different CAD/CAM materials, including Lava Ultimate (LU) and IPS e.max CAD (EMX), were specified for both models. Each model was subjected to three different force loads on the occlusal surfaces. Stress distribution patterns and the maximum von Mises (VM) stresses were calculated and compared. Results Compared to the base model, all restorations showed that high-stress concentration moved from the lower margin of the crack area towards the top of the crack area. The EMX-restored onlay, overlay, and occlusal veneer 2 had the lower stress in the cracked area and the lower average von Mises stress levels at the lower margin along the cracked line, especially under the 225N lateral force (P
Document Type: article
File Description: electronic resource
Language: English
ISSN: 1472-6831
Relation: https://doaj.org/toc/1472-6831
DOI: 10.1186/s12903-024-05122-8
Access URL: https://doaj.org/article/54bed1ebee15452aaf2f1bb1aa5570a8
Accession Number: edsdoj.54bed1ebee15452aaf2f1bb1aa5570a8
Database: Directory of Open Access Journals
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  Data: Effect of different restorative design and materials on stress distribution in cracked teeth: a finite element analysis study
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  Data: <searchLink fieldCode="AR" term="%22Ting+Liu%22">Ting Liu</searchLink><br /><searchLink fieldCode="AR" term="%22Yinghao+Huang%22">Yinghao Huang</searchLink><br /><searchLink fieldCode="AR" term="%22Yue+Li%22">Yue Li</searchLink><br /><searchLink fieldCode="AR" term="%22Jiali+Meng%22">Jiali Meng</searchLink><br /><searchLink fieldCode="AR" term="%22Yajing+Liu%22">Yajing Liu</searchLink><br /><searchLink fieldCode="AR" term="%22Yuan+Wei%22">Yuan Wei</searchLink><br /><searchLink fieldCode="AR" term="%22Yequan+Huang%22">Yequan Huang</searchLink><br /><searchLink fieldCode="AR" term="%22Qian+Zhou%22">Qian Zhou</searchLink><br /><searchLink fieldCode="AR" term="%22Weidong+Yang%22">Weidong Yang</searchLink><br /><searchLink fieldCode="AR" term="%22Fuhua+Yan%22">Fuhua Yan</searchLink><br /><searchLink fieldCode="AR" term="%22Xiang+Wang%22">Xiang Wang</searchLink><br /><searchLink fieldCode="AR" term="%22Yanan+Zhu%22">Yanan Zhu</searchLink>
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  Data: BMC Oral Health, Vol 25, Iss 1, Pp 1-17 (2025)
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  Data: <searchLink fieldCode="DE" term="%22Finite+element+analysis%22">Finite element analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Cracked+tooth%22">Cracked tooth</searchLink><br /><searchLink fieldCode="DE" term="%22Restoration+design%22">Restoration design</searchLink><br /><searchLink fieldCode="DE" term="%22Occlusal+veneer%22">Occlusal veneer</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+properties%22">Mechanical properties</searchLink><br /><searchLink fieldCode="DE" term="%22Dentistry%22">Dentistry</searchLink><br /><searchLink fieldCode="DE" term="%22RK1-715%22">RK1-715</searchLink>
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  Label: Description
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  Data: Abstract Objectives To compare the stress distribution and crack propagation in cracked mandibular first molar restored with onlay, overlay, and two types of occlusal veneers using two different CAD/CAM materials by Finite Element Analysis (FEA). Materials and methods A mandibular first molar was digitized using a micro CT scanning system in 2023. Three-dimensional dynamic scan data were transformed, and a 3D model of a cracked tooth was generated. Finite element models of four different models (onlay, overlay, and two types of occlusal veneer restored teeth) were designed. Two different CAD/CAM materials, including Lava Ultimate (LU) and IPS e.max CAD (EMX), were specified for both models. Each model was subjected to three different force loads on the occlusal surfaces. Stress distribution patterns and the maximum von Mises (VM) stresses were calculated and compared. Results Compared to the base model, all restorations showed that high-stress concentration moved from the lower margin of the crack area towards the top of the crack area. The EMX-restored onlay, overlay, and occlusal veneer 2 had the lower stress in the cracked area and the lower average von Mises stress levels at the lower margin along the cracked line, especially under the 225N lateral force (P
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      – Text: English
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    Subjects:
      – SubjectFull: Finite element analysis
        Type: general
      – SubjectFull: Cracked tooth
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      – SubjectFull: Restoration design
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