3-D finite element analysis of the influence of synovial condition in sacroiliac joint on the load transmission in human pelvic system |
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| Institution: | 1. Institute of Biomedical Manufacturing and Life Quality Engineering, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai 200240, China;2. Department of Trauma and Orthopedics, Shanghai First People''s Hospital, Medical School, Shanghai Jiao Tong University, No. 650, New Songjiang Road, Shanghai 201620, China;3. School of Life Sciences & Biotechnology, Shanghai Jiao Tong University, No. 800, Dongchuan Road, Shanghai 200240, China;1. AO Research Institute Davos, Clavadelerstrasse 8, CH-7270 Davos, Switzerland;2. Eberhard Karls University Tübingen, BG Trauma Center, Schnarrenbergstrasse 95, D-72076 Tuebingen, Germany;3. Ebrhard Karls University Tübingen, Institute of Clinical Anatomy, Elfriede-Aulhorn-Str. 8, D-72076 Tuebingen, Germany;1. Department of Mechanical Engineering & Mechanics, Lehigh University, Bethlehem, PA 18015, United States;2. Respiratory and Critical Care Medicine, University of Missouri-Kansas City School of Medicine, Kansas City, MO 64108, United States;1. Ankara Numune Training and Research Hospital, Orthopaedics and Traumatology Clinics, Ankara, Turkey;2. Ankara Training and Research Hospital, Orthopaedics and Traumatology Clinics, Ankara, Turkey;3. Antalya Training and Research Hospital, Antalya, Turkey;1. Department of Biomedical Engineering, 3131 Engineering Hall, University of California, Irvine, CA 92617, USA;2. Department of Neurosurgery, Orthopedics, and Biomedical Engineering, Mayo Clinic School of Medicine, 200 1st St. SW, Rochester, MN 55905, USA;1. Lunenfeld Tanenbaum Research Institute, Mount Sinai Hospital, University of Toronto, Toronto, ON, Canada;2. Mount Sinai Hospital, Division of Orthopaedic Surgery, University of Toronto, Toronto, ON, Canada;3. Department of Surgery, University of Toronto, Toronto, ON, Canada |
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| Abstract: | The anterior part of the sacroiliac joint (SIJ) is a synovial joint, with little gliding and rotary movement between the contact surfaces of SIJ during locomotion. Due to its complex structure, especially when considering the surrounding ligaments, it is difficult to construct an accurate three-dimensional (3-D) finite element model for the human pelvis. Most of the pelvic models in the previous studies were simplified with either SIJ fusing together or without the sacral bone. However, the influence of those simplifications on the load transmission in human pelvis has not been studied, so the reliability of those studies remains unclear. In this study, two 3-D pelvic models were constructed: an SIJ fusing model and an SIJ contacting model. In the SIJ fusing model, the SIJ interfaces were fused together. In the SIJ contacting model, the SIJ interfaces were just in contact with each other without fusion. Compared with the SIJ contacting model, the SIJ fusing model have smaller movements in the SIJ. The stress distribution area in the SIJ fusing model on sacroiliac cartilages was also different. Those differences contributed to the decline of tensile force in the SIJ surrounding ligaments and the re-distribution of stress in the pelvic bones. In addition, the SIJ fusing model was far less sensitive to the increase in modulus of the sacroiliac cartilages, and decrease in stiffness of the ligaments surrounding the SIJ. The presence of synovia in the SIJ had greater influence on the load transmission in the human pelvic system. Therefore, the effect of the presence of synovia should not be neglected when the biomechanical behavior of human pelvis is being studied, especially for those studies related to clinical applications. |
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| Keywords: | Sacroiliac joint Pelvis Synovial Slight movement Finite element model Biomechanics |
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