Stress Distribution Pattern in Mandibular Overdenture Designs Supported by Three Dental Implants: A 3D Finite Element Analysis
ABSTRACT Objectives The purpose of this study was to assess the implant‐supported overdenture stress distribution pattern in cancellous and cortical bone, dental implants, and prosthetic components, and its displacement by using finite element analysis (FEA). Materials and Methods An edentulous mode...
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Wiley
2025-02-01
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| Series: | Clinical and Experimental Dental Research |
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| Online Access: | https://doi.org/10.1002/cre2.70060 |
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| author | Negin Aminianpour Marzieh Alikhasi Mostafa Shabanpour Kasari Hashem Yousefi Hakimeh Siadat |
| author_facet | Negin Aminianpour Marzieh Alikhasi Mostafa Shabanpour Kasari Hashem Yousefi Hakimeh Siadat |
| author_sort | Negin Aminianpour |
| collection | DOAJ |
| description | ABSTRACT Objectives The purpose of this study was to assess the implant‐supported overdenture stress distribution pattern in cancellous and cortical bone, dental implants, and prosthetic components, and its displacement by using finite element analysis (FEA). Materials and Methods An edentulous model of the mandible was designed with three dental implants placed at the sites of canine teeth and the midline. Six groups were designed with isolated (ball and locator) and splinted (conventional bar and a CAD/CAM milled bar with cast and screw ball) attachments with and without a cantilever using SolidWorks 2022 software. The stress distribution pattern in the surrounding bone, implants, and prosthetic components (attachments, caps, housings, and screws) was evaluated following the application of 150 N force vertically and 105 N load with a 30° angle relative to the first molar site using Abaqus/CAE 2021 software. The implant‐supported overdenture displacement was also evaluated. Results The ball attachment caused the highest stress in the attachments (363 and 896 MPa) and housings (375 and 1187 MPa) under vertical and oblique loadings, and cancellous bone (6 MPa under vertical loading). The pattern of stress distribution was variable following vertical and oblique loading in the cortical bone and dental implants in different groups. The locator attachment resulted in lower stress distribution in bone, implants, and prosthetic components. In splinted groups, the cantilever designs caused lower stress in bone, implants, and prosthetic components in comparison with designs without a cantilever. The conventional and milled bar did not show any mechanical difference. Conclusion Considering the stress distribution patterns, the locator attachment is preferred to the ball isolated attachment, and the cantilever design is preferred among the splinted types. Isolated attachments were more effective in controlling the displacement. Also, conventional and milled bars did not show any superiority over each other. |
| format | Article |
| id | doaj-art-2bda342997cc4fc895cc9a80bc7ed474 |
| institution | OA Journals |
| issn | 2057-4347 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Clinical and Experimental Dental Research |
| spelling | doaj-art-2bda342997cc4fc895cc9a80bc7ed4742025-08-20T02:08:15ZengWileyClinical and Experimental Dental Research2057-43472025-02-01111n/an/a10.1002/cre2.70060Stress Distribution Pattern in Mandibular Overdenture Designs Supported by Three Dental Implants: A 3D Finite Element AnalysisNegin Aminianpour0Marzieh Alikhasi1Mostafa Shabanpour Kasari2Hashem Yousefi3Hakimeh Siadat4Dental Research Center, Dentistry Research Institute Tehran University of Medical Sciences Tehran IranDental Research Center, Dentistry Research Institute Tehran University of Medical Sciences Tehran IranDepartment of Mechanical Engineering Iran University of Science and Technology Tehran IranResearch and Development Unit Avita Dental Implant System, KFP‐Dental Tehran IranDental Research Center, Dentistry Research Institute Tehran University of Medical Sciences Tehran IranABSTRACT Objectives The purpose of this study was to assess the implant‐supported overdenture stress distribution pattern in cancellous and cortical bone, dental implants, and prosthetic components, and its displacement by using finite element analysis (FEA). Materials and Methods An edentulous model of the mandible was designed with three dental implants placed at the sites of canine teeth and the midline. Six groups were designed with isolated (ball and locator) and splinted (conventional bar and a CAD/CAM milled bar with cast and screw ball) attachments with and without a cantilever using SolidWorks 2022 software. The stress distribution pattern in the surrounding bone, implants, and prosthetic components (attachments, caps, housings, and screws) was evaluated following the application of 150 N force vertically and 105 N load with a 30° angle relative to the first molar site using Abaqus/CAE 2021 software. The implant‐supported overdenture displacement was also evaluated. Results The ball attachment caused the highest stress in the attachments (363 and 896 MPa) and housings (375 and 1187 MPa) under vertical and oblique loadings, and cancellous bone (6 MPa under vertical loading). The pattern of stress distribution was variable following vertical and oblique loading in the cortical bone and dental implants in different groups. The locator attachment resulted in lower stress distribution in bone, implants, and prosthetic components. In splinted groups, the cantilever designs caused lower stress in bone, implants, and prosthetic components in comparison with designs without a cantilever. The conventional and milled bar did not show any mechanical difference. Conclusion Considering the stress distribution patterns, the locator attachment is preferred to the ball isolated attachment, and the cantilever design is preferred among the splinted types. Isolated attachments were more effective in controlling the displacement. Also, conventional and milled bars did not show any superiority over each other.https://doi.org/10.1002/cre2.70060computer‐aided designdental implantsdenturefinite element analysisoverlayvon Mises stress |
| spellingShingle | Negin Aminianpour Marzieh Alikhasi Mostafa Shabanpour Kasari Hashem Yousefi Hakimeh Siadat Stress Distribution Pattern in Mandibular Overdenture Designs Supported by Three Dental Implants: A 3D Finite Element Analysis Clinical and Experimental Dental Research computer‐aided design dental implants denture finite element analysis overlay von Mises stress |
| title | Stress Distribution Pattern in Mandibular Overdenture Designs Supported by Three Dental Implants: A 3D Finite Element Analysis |
| title_full | Stress Distribution Pattern in Mandibular Overdenture Designs Supported by Three Dental Implants: A 3D Finite Element Analysis |
| title_fullStr | Stress Distribution Pattern in Mandibular Overdenture Designs Supported by Three Dental Implants: A 3D Finite Element Analysis |
| title_full_unstemmed | Stress Distribution Pattern in Mandibular Overdenture Designs Supported by Three Dental Implants: A 3D Finite Element Analysis |
| title_short | Stress Distribution Pattern in Mandibular Overdenture Designs Supported by Three Dental Implants: A 3D Finite Element Analysis |
| title_sort | stress distribution pattern in mandibular overdenture designs supported by three dental implants a 3d finite element analysis |
| topic | computer‐aided design dental implants denture finite element analysis overlay von Mises stress |
| url | https://doi.org/10.1002/cre2.70060 |
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