Predicting time-dependent remodeling of bone around immediately loaded dental implants with different designs |
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| Authors: | Atilim Eser Ergin Tonuk Kivanc Akca Murat Cavit Cehreli |
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| Institution: | 1. Mechanical Engineering Department, Faculty of Engineering, Middle East Technical University, Ankara, Turkey;2. Biomedical Engineering Graduate Program, Institute of Natural and Applied Sciences, Middle East Technical University, Ankara, Turkey;3. Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, 06100 S?hhiye, Ankara, Turkey;4. Section of Prosthodontics, CosmORAL Oral and Dental Health Polyclinics, Cinnah Cad. 7/5 06680 Kavaklidere, Ankara, Turkey;1. Clinical Assistant Professor, Department of Dentistry, School of Medicine, Ewha Womans University, Seoul, Korea;2. Professor, Department of Prosthodontics, School of Dentistry, Seoul National University, Seoul, Korea;1. Clinical Assistant Professor of Dentistry, Division of Restorative Dentistry, Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, Calif;2. Postdoctoral Research Fellow, Center for Craniofacial Molecular Biology (CCMB), Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, Calif;3. Ralph and Jean Bleak Professor of Restorative Dentistry and Program Director, Advanced Prosthodontics, Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, Calif;1. Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India;2. Department of Applied Mechanics, Indian Institute of Technology Madras, Chennai 600036, India;1. Charité – Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Dental Materials and Biomaterial Research, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197 Berlin, Germany;2. Beuth University of Applied Sciences, Luxemburger Str. 10, 13353 Berlin, Germany;3. Charité – Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Aßmannshauser Str. 4-6, 14197 Berlin, Germany;1. Faculty of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran;2. Prosthodontics Department, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran;3. Dental Implant Research Center, Tehran University of Medical Sciences, Tehran, Iran;4. Department of Clinical Sciences, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran |
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| Abstract: | The purpose of this study was to predict time-dependent biomechanics of bone around cylindrical screw dental implants with different macrogeometric designs under simulated immediate loading condition. The remodeling of bone around a parallel-sided and a tapered dental implant of same length was studied under 100 N oblique load by implementing the Stanford theory into three-dimensional finite element models. The results of the analyses were examined in five time intervals consisting loading immediately after implant placement, and after 1, 2, 3 and 4 weeks following implantation. Maximum principal stress, minimum principal stress, and strain energy density in peri-implant bone and displacement in x-(implant lateral direction with a projection of the oblique force) and y-(implant longitudinal direction) axes of the implant were evaluated. The highest value of the maximum and minimum principal stresses around both implants increased in cortical bone and decreased in trabecular bone. The maximum and minimum principal stresses in cortical bone were higher around the tapered cylindrical implant, but stresses in the trabecular bone were higher around the parallel-sided cylindrical implant. Strain energy density around both implants increased in cortical bone, slightly decreased in trabecular bone, and higher values were obtained for the parallel-sided cylindrical implant. Displacement values slightly decreased in time in x-axis, and an initial decrease followed by a slight increase was observed in the y-axis. Bone responded differently in remodeling for the two implant designs under immediate loading, where the cortical bone carried the highest load. Application of oblique loading resulted in increase of stiffness in the peri-implant bone. |
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