Acetabular reinforcement ring with additional hook improves stability in three-dimensional finite element analyses of dysplastic hip arthroplasty
| Autor: | Koki Ouchi, Koji Totoribe, Gang Deng, Etsuo Chosa, Go Yamako, Xin Zhao, Hiroaki Hamada |
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| Rok vydání: | 2018 |
| Předmět: |
Finite element method
endocrine system medicine.medical_specialty lcsh:Diseases of the musculoskeletal system Hook Arthroplasty Replacement Hip Finite Element Analysis Prosthesis Design Stress (mechanics) 03 medical and health sciences Imaging Three-Dimensional 0302 clinical medicine lcsh:Orthopedic surgery medicine Humans Orthopedics and Sports Medicine 030212 general & internal medicine Reinforcement Primary implant stability Orthodontics 030222 orthopedics business.industry Stiffness Acetabulum Surgical Instruments musculoskeletal system lcsh:RD701-811 surgical procedures operative Orthopedic surgery Acetabular reinforcement ring bacteria Total hip arthroplasty Surgery Hip Prosthesis sense organs lcsh:RC925-935 medicine.symptom Material properties business Research Article |
| Zdroj: | Journal of Orthopaedic Surgery and Research Journal of Orthopaedic Surgery and Research, Vol 13, Iss 1, Pp 1-7 (2018) |
| ISSN: | 1749-799X |
| DOI: | 10.1186/s13018-018-1023-7 |
| Popis: | Background The stability of acetabulum reconstructions using reinforcement rings and hooks is important for successful replacement surgery. The objective of this study was to biomechanically determine the effects of the hook on stress and the related micromotions of the acetabular reinforcement ring during the immediate postoperative period. Methods Acetabular reinforcement ring models were developed using a nonlinear, three-dimensional, finite element method. Using a pre-prepared template, we constructed without-hook and bone graft models of varying volumes and material properties. Results The stress on the inferior margin of the acetabulum was higher in the with-hook model than in the without-hook model, especially with increased bone graft volumes, and the stiffness of the bone graft material was decreased. Relative micromotions in the without-hook model were higher than in the with-hook models. The highest relative micromotion was observed in the model with increased bone graft volume and lower stiffness of bone graft material. Conclusions In biomechanical analyses, the hook effectively dispersed stress and improved the initial fixation strength of the acetabular reinforcement ring. |
| Databáze: | OpenAIRE |
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