Evaluation of Stress Distribution on Mandibular Implant-Supported Overdentures With Different Bone Heights and Attachment Types: A 3D Finite Element Analysis
| Autor: | Ozgun Yusuf Ozyilmaz, Mahmut Sertac Ozdogan, Güzin Neda Hasanoğlu Erbaşar, Gokce Soganci Unsal, Filiz Aykent |
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| Přispěvatelé: | ÖZYILMAZ, ÖZGÜN YUSUF |
| Rok vydání: | 2019 |
| Předmět: |
Dental Implants
Dental Stress Analysis Orthodontics A 3D Finite Element Analysis.- The Journal of oral implantology cilt.45 ss.363-370 2019 [Unsal G. Erbasar G. Aykent F. Ozyilmaz Ö. Y. Ozdogan M. -Evaluation of Stress Distribution on Mandibular Implant-Supported Overdentures With Different Bone Heights and Attachment Types] Materials science Finite Element Analysis 0206 medical engineering Edentulous mandible Mandible 030206 dentistry 02 engineering and technology Stress distribution Denture Overlay 020601 biomedical engineering Finite element method 03 medical and health sciences 0302 clinical medicine Dental Prosthesis Implant-Supported Stress Mechanical Oral Surgery Bone height Implant supported |
| Zdroj: | Journal of Oral Implantology. 45:363-370 |
| ISSN: | 1548-1336 0160-6972 |
| DOI: | 10.1563/aaid-joi-d-19-00076 |
| Popis: | The biomechanical behavior of the edentulous mandible with bone irregularities that has been rehabilitated with implant-supported overdentures has become an important factor for treatment planning. Restorative options, including dental implants with various attachments, affect the stress distribution. The purpose of this study was to evaluate the stress distribution of cortical bone around the implant neck and implant structures in overdentures with two different attachment types at the edentulous mandible and with different bone heights using three-dimensional finite element analysis. Five three-dimensional models of an edentulous mandible were designed and implemented. Ten models were constructed with ball and locator attachments. Static bilateral and unilateral vertical and oblique occlusal loads with magnitudes of 100 N were applied to the overdentures. The principal stresses were higher in the presence of oblique loads compared to vertical loads in all the analyzed models. Maximum principal stresses were observed around the mesial side of the contralateral implant, and the minimum principal stresses were noted around the distal side of ipsilateral implant during unilateral vertical loading. These patterns were reversed during oblique loadings. The ball attachment models yielded lower von Mises stress values than the locator models at all the loading conditions, while the stress distributions were similar in the models with the same and different bone levels. Correspondingly, bone corrections due to irregularities may not be necessary in terms of biomechanics. The results of this study may provide clinicians a better understanding for the mandibular overdenture design in the cases at which different bone heights exist. |
| Databáze: | OpenAIRE |
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