Global biomechanical model for dental implants |
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| Authors: | Hansson Stig Löberg Johanna Mattisson Ingela Ahlberg Elisabet |
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| Institution: | 1. Department of Radiation Oncology, Lucien Neuwirth Cancer Institute, Saint-Priest-en-Jarez;;2. Laboratory of Cellular and Molecular Radiobiology, Institut de Physique Nucléaire de Lyon, IPNL, Villeurbanne;;3. SAINBIOSE U1059, Jean Monnet University, Saint-Etienne;;4. Department of Radiation Oncology, Gustave Roussy Cancer Campus, Villejuif, France;1. Department of Surgery, University of Minnesota, Minneapolis, MN, USA;2. Department of Medical Oncology, University of Minnesota, Minneapolis, MN, USA;3. Department of Radiology, University of Minnesota, Minneapolis, MN, USA |
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| Abstract: | The osseointegration of titanium dental implants is a complex process and there is a need for systematization of the factors influencing anchoring of implant. A common way of analyzing the strength of the fixation in bone is by measuring the torque required to remove the implants after healing. In this paper, a global biomechanical model is introduced and derived for removal torque situations. In this model, a gap is allowed to form between the bone and the implant and the size of the gap at fracture is a function of the surface roughness and can be shown to be directly related to the mean slope of the surface. The interfacial shear strength increases almost linearly with the mean slope and was also found to increase with an increase in the 2D surface roughness parameter, R(a). Besides the surface roughness, the design of the implant, the bone anatomy and the bone quality were shown to influence the interfacial shear strength. The Global biomechanical model can be used as a tool for optimizing the implant design and the surface topography to obtain high anchoring strength. |
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