The influence of pelvic tilt on stress distribution in the acetabulum: finite element analysis
Abstract Background Finite element analysis (FEA) has been previously applied for the biomechanical analysis of acetabular dysplasia and osteotomy. However, until now, there have been little reports on the use of FEA to evaluate the effects of pelvic tilt on stress distribution in the acetabulum. Me...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2021-09-01
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| Series: | BMC Musculoskeletal Disorders |
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| Online Access: | https://doi.org/10.1186/s12891-021-04500-5 |
| _version_ | 1829520448768966656 |
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| author | Kazuhiro Hasegawa Tamon Kabata Yoshitomo Kajino Daisuke Inoue Jiro Sakamoto Hiroyuki Tsuchiya |
| author_facet | Kazuhiro Hasegawa Tamon Kabata Yoshitomo Kajino Daisuke Inoue Jiro Sakamoto Hiroyuki Tsuchiya |
| author_sort | Kazuhiro Hasegawa |
| collection | DOAJ |
| description | Abstract Background Finite element analysis (FEA) has been previously applied for the biomechanical analysis of acetabular dysplasia and osteotomy. However, until now, there have been little reports on the use of FEA to evaluate the effects of pelvic tilt on stress distribution in the acetabulum. Methods We used the Mechanical Finder Ver. 7.0 (RCCM, Inc., Japan) to construct finite element models based on 3D-CT data of patients, and designed dysplasia, borderline, and normal pelvic models. For analysis, body weight was placed on the sacrum and the load of the flexor muscles of the hip joint was placed on the ilium. The pelvic tilt was based on the anterior pelvic plane, and the pelvic tilt angles were -20°, 0°, and 20°. The load of the flexor muscle of the hip joint was calculated using the moment arm equation. Results All three models showed the highest values of von Mises stress in the -20° pelvic tilt angle, and the lowest in the 20° angle. Stress distribution concentrated in the load-bearing area. The maximum values of von Mises stress in the borderline at pelvic tilt angles of -20° was 3.5Mpa, and in the dysplasia at pelvic tilt angles of 0° was 3.1Mpa. Conclusions The pelvic tilt angle of -20° of the borderline model showed equal maximum values of von Mises stress than the dysplasia model of pelvic tilt angle of 0°, indicating that pelvic retroversion of -20° in borderline is a risk factor for osteoarthritis of the hip joints, similar to dysplasia. |
| first_indexed | 2024-12-16T14:57:33Z |
| format | Article |
| id | doaj.art-e88db45f59784b7faf42b399e567ab6c |
| institution | Directory Open Access Journal |
| issn | 1471-2474 |
| language | English |
| last_indexed | 2024-12-16T14:57:33Z |
| publishDate | 2021-09-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Musculoskeletal Disorders |
| spelling | doaj.art-e88db45f59784b7faf42b399e567ab6c2022-12-21T22:27:24ZengBMCBMC Musculoskeletal Disorders1471-24742021-09-012211710.1186/s12891-021-04500-5The influence of pelvic tilt on stress distribution in the acetabulum: finite element analysisKazuhiro Hasegawa0Tamon Kabata1Yoshitomo Kajino2Daisuke Inoue3Jiro Sakamoto4Hiroyuki Tsuchiya5Department of Orthopaedic Surgery, Suzu General HospitalDepartment of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa UniversityDepartment of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa UniversityDepartment of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa UniversityBio Engineering Laboratory, School of Mechanical Engineering, Kanazawa UniversityDepartment of Orthopaedic Surgery, Graduate School of Medical Science, Kanazawa UniversityAbstract Background Finite element analysis (FEA) has been previously applied for the biomechanical analysis of acetabular dysplasia and osteotomy. However, until now, there have been little reports on the use of FEA to evaluate the effects of pelvic tilt on stress distribution in the acetabulum. Methods We used the Mechanical Finder Ver. 7.0 (RCCM, Inc., Japan) to construct finite element models based on 3D-CT data of patients, and designed dysplasia, borderline, and normal pelvic models. For analysis, body weight was placed on the sacrum and the load of the flexor muscles of the hip joint was placed on the ilium. The pelvic tilt was based on the anterior pelvic plane, and the pelvic tilt angles were -20°, 0°, and 20°. The load of the flexor muscle of the hip joint was calculated using the moment arm equation. Results All three models showed the highest values of von Mises stress in the -20° pelvic tilt angle, and the lowest in the 20° angle. Stress distribution concentrated in the load-bearing area. The maximum values of von Mises stress in the borderline at pelvic tilt angles of -20° was 3.5Mpa, and in the dysplasia at pelvic tilt angles of 0° was 3.1Mpa. Conclusions The pelvic tilt angle of -20° of the borderline model showed equal maximum values of von Mises stress than the dysplasia model of pelvic tilt angle of 0°, indicating that pelvic retroversion of -20° in borderline is a risk factor for osteoarthritis of the hip joints, similar to dysplasia.https://doi.org/10.1186/s12891-021-04500-5Finite element analysisOsteoarthritisPelvic tiltAcetabular dysplasia |
| spellingShingle | Kazuhiro Hasegawa Tamon Kabata Yoshitomo Kajino Daisuke Inoue Jiro Sakamoto Hiroyuki Tsuchiya The influence of pelvic tilt on stress distribution in the acetabulum: finite element analysis BMC Musculoskeletal Disorders Finite element analysis Osteoarthritis Pelvic tilt Acetabular dysplasia |
| title | The influence of pelvic tilt on stress distribution in the acetabulum: finite element analysis |
| title_full | The influence of pelvic tilt on stress distribution in the acetabulum: finite element analysis |
| title_fullStr | The influence of pelvic tilt on stress distribution in the acetabulum: finite element analysis |
| title_full_unstemmed | The influence of pelvic tilt on stress distribution in the acetabulum: finite element analysis |
| title_short | The influence of pelvic tilt on stress distribution in the acetabulum: finite element analysis |
| title_sort | influence of pelvic tilt on stress distribution in the acetabulum finite element analysis |
| topic | Finite element analysis Osteoarthritis Pelvic tilt Acetabular dysplasia |
| url | https://doi.org/10.1186/s12891-021-04500-5 |
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