A New Multi-Axial Functional Stress Analysis Assessing the Longevity of a Ti-6Al-4V Dental Implant Abutment Screw
This study investigates the impact of tightening torque (preload) and the friction coefficient on stress generation and fatigue resistance of a Ti-6Al-4V abutment screw with an internal hexagonal connection under dynamic multi-axial masticatory loads in high-cycle fatigue (HCF) conditions. A three-d...
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MDPI AG
2024-11-01
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| Series: | Biomimetics |
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| Online Access: | https://www.mdpi.com/2313-7673/9/11/689 |
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| author | Ghada H. Naguib Ahmed O. Abougazia Lulwa E. Al-Turki Hisham A. Mously Abou Bakr Hossam Hashem Abdulghani I. Mira Osama A. Qutub Abdulelah M. Binmahfooz Afaf A. Almabadi Mohamed T. Hamed |
| author_facet | Ghada H. Naguib Ahmed O. Abougazia Lulwa E. Al-Turki Hisham A. Mously Abou Bakr Hossam Hashem Abdulghani I. Mira Osama A. Qutub Abdulelah M. Binmahfooz Afaf A. Almabadi Mohamed T. Hamed |
| author_sort | Ghada H. Naguib |
| collection | DOAJ |
| description | This study investigates the impact of tightening torque (preload) and the friction coefficient on stress generation and fatigue resistance of a Ti-6Al-4V abutment screw with an internal hexagonal connection under dynamic multi-axial masticatory loads in high-cycle fatigue (HCF) conditions. A three-dimensional model of the implant–abutment assembly was simulated using ANSYS Workbench 16.2 computer aided engineering software with chewing forces ranging from 300 N to 1000 N, evaluated over 1.35 × 10<sup>7</sup> cycles, simulating 15 years of service. Results indicate that the healthy range of normal to maximal mastication forces (300–550 N) preserved the screw’s structural integrity, while higher loads (≥800 N) exceeded the Ti-6Al-4V alloy’s yield strength, indicating a risk of plastic deformation under extreme conditions. Stress peaked near the end of the occluding phase (206.5 ms), marking a critical temporal point for fatigue accumulation. Optimizing the friction coefficient (0.5 µ) and preload management improved stress distribution, minimized fatigue damage, and ensured joint stability. Masticatory forces up to 550 N were well within the abutment screw’s capacity to sustain extended service life and maintain its elastic behavior. |
| format | Article |
| id | doaj-art-e7b101e0ce1d4ef381306a8e07653a8e |
| institution | OA Journals |
| issn | 2313-7673 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
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| series | Biomimetics |
| spelling | doaj-art-e7b101e0ce1d4ef381306a8e07653a8e2025-08-20T02:28:07ZengMDPI AGBiomimetics2313-76732024-11-0191168910.3390/biomimetics9110689A New Multi-Axial Functional Stress Analysis Assessing the Longevity of a Ti-6Al-4V Dental Implant Abutment ScrewGhada H. Naguib0Ahmed O. Abougazia1Lulwa E. Al-Turki2Hisham A. Mously3Abou Bakr Hossam Hashem4Abdulghani I. Mira5Osama A. Qutub6Abdulelah M. Binmahfooz7Afaf A. Almabadi8Mohamed T. Hamed9Department of Restorative Dentistry, Faculty of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah 21589, Saudi ArabiaIndependent Researcher, Giza 12573, EgyptDepartment of Oral and Maxillofacial Prosthodontics, Faculty of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah 21589, Saudi ArabiaDepartment of Oral and Maxillofacial Prosthodontics, Faculty of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah 21589, Saudi ArabiaDental Department, Research Institute of Ophthalmology, Oula, Giza District, Giza 12557, EgyptDepartment of Restorative Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah 21589, Saudi ArabiaDepartment of Oral and Maxillofacial Prosthodontics, Faculty of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah 21589, Saudi ArabiaDepartment of Oral and Maxillofacial Prosthodontics, Faculty of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah 21589, Saudi ArabiaDepartment of Oral and Maxillofacial Prosthodontics, Faculty of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah 21589, Saudi ArabiaDepartment of Oral and Maxillofacial Prosthodontics, Faculty of Dentistry, King Abdulaziz University, P.O. Box 80209, Jeddah 21589, Saudi ArabiaThis study investigates the impact of tightening torque (preload) and the friction coefficient on stress generation and fatigue resistance of a Ti-6Al-4V abutment screw with an internal hexagonal connection under dynamic multi-axial masticatory loads in high-cycle fatigue (HCF) conditions. A three-dimensional model of the implant–abutment assembly was simulated using ANSYS Workbench 16.2 computer aided engineering software with chewing forces ranging from 300 N to 1000 N, evaluated over 1.35 × 10<sup>7</sup> cycles, simulating 15 years of service. Results indicate that the healthy range of normal to maximal mastication forces (300–550 N) preserved the screw’s structural integrity, while higher loads (≥800 N) exceeded the Ti-6Al-4V alloy’s yield strength, indicating a risk of plastic deformation under extreme conditions. Stress peaked near the end of the occluding phase (206.5 ms), marking a critical temporal point for fatigue accumulation. Optimizing the friction coefficient (0.5 µ) and preload management improved stress distribution, minimized fatigue damage, and ensured joint stability. Masticatory forces up to 550 N were well within the abutment screw’s capacity to sustain extended service life and maintain its elastic behavior.https://www.mdpi.com/2313-7673/9/11/689dental implant therapyabutment screwpreloadfatigue life predictiondynamic loadingbiomaterials |
| spellingShingle | Ghada H. Naguib Ahmed O. Abougazia Lulwa E. Al-Turki Hisham A. Mously Abou Bakr Hossam Hashem Abdulghani I. Mira Osama A. Qutub Abdulelah M. Binmahfooz Afaf A. Almabadi Mohamed T. Hamed A New Multi-Axial Functional Stress Analysis Assessing the Longevity of a Ti-6Al-4V Dental Implant Abutment Screw Biomimetics dental implant therapy abutment screw preload fatigue life prediction dynamic loading biomaterials |
| title | A New Multi-Axial Functional Stress Analysis Assessing the Longevity of a Ti-6Al-4V Dental Implant Abutment Screw |
| title_full | A New Multi-Axial Functional Stress Analysis Assessing the Longevity of a Ti-6Al-4V Dental Implant Abutment Screw |
| title_fullStr | A New Multi-Axial Functional Stress Analysis Assessing the Longevity of a Ti-6Al-4V Dental Implant Abutment Screw |
| title_full_unstemmed | A New Multi-Axial Functional Stress Analysis Assessing the Longevity of a Ti-6Al-4V Dental Implant Abutment Screw |
| title_short | A New Multi-Axial Functional Stress Analysis Assessing the Longevity of a Ti-6Al-4V Dental Implant Abutment Screw |
| title_sort | new multi axial functional stress analysis assessing the longevity of a ti 6al 4v dental implant abutment screw |
| topic | dental implant therapy abutment screw preload fatigue life prediction dynamic loading biomaterials |
| url | https://www.mdpi.com/2313-7673/9/11/689 |
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