The effect of the necrotic area on the biomechanics of the femoral head - a finite element study
Abstract Background Femoral head collapse is the key to the progress of osteonecrosis of the femoral head (ONFH), but the causes of collapse are not completely clear. The better understanding of the progress of femoral head collapse will guide the treatment strategy for ONFH patients. The purpose of...
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| Format: | Article |
| Language: | English |
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BMC
2020-04-01
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| Series: | BMC Musculoskeletal Disorders |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1186/s12891-020-03242-0 |
| _version_ | 1819010601260679168 |
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| author | Pengfei Wen Yumin Zhang Linjie Hao Ju’an Yue Jun Wang Tao Wang Wei Song Wanshou Guo Tao Ma |
| author_facet | Pengfei Wen Yumin Zhang Linjie Hao Ju’an Yue Jun Wang Tao Wang Wei Song Wanshou Guo Tao Ma |
| author_sort | Pengfei Wen |
| collection | DOAJ |
| description | Abstract Background Femoral head collapse is the key to the progress of osteonecrosis of the femoral head (ONFH), but the causes of collapse are not completely clear. The better understanding of the progress of femoral head collapse will guide the treatment strategy for ONFH patients. The purpose of this study was to evaluate the biomechanical influence of necrosis area on the collapse of the femoral head by finite element analysis. Methods CT and MRI data from the hip joint of a healthy volunteer were collected to establish a finite element (FE) model of a normal hip. Subsequently, five categories of osteonecrosis FE models were established by using the normal model and computer software according to China-Japan Friendship Hospital (CJFH) classification for ONFH. The CJFH system includes five types based on the size and location of necrosis lesions in the femoral head (type M, C, L1, L2, and L3) and the stage of ONFH. The collapse indices of each model were analyzed by FE method, including the displacement, peak von Mises stress and stress index of the simulated necrotic area as well as the lateral pillar contact area of the femoral head to acetabular. Results (1) The displacement increments in the simulated necrotic areas of type M, C, L1, L2, and L3 models were 3.75 μm, 8.24 μm, 8.47 μm, 18.42 μm, and 20.44 μm respectively; the peak von Mises stress decrements were 1.50 MPa, 3.74 MPa, 3.73 MPa, 4.91 MPa, and 4.92 MPa respectively; and the stress indices were 0.04, 0.08, 0.08, 0.27, and 0.27 respectively. (2) The displacement increments in the lateral pillar contact areas of five type models were significantly different (P < 0.001) and increased in sequence as follows: 1.93 ± 0.15 μm, 5.74 ± 0.92 μm, 5.84 ± 1.42 μm, 14.50 ± 3.00 μm, and 16.43 ± 3.05 μm. The peak von Mises stress decrements were also significantly different (P < 0.001) and increased in sequence as follows: 0.52 ± 0.30 MPa, 0.55 ± 0.12 MPa, 0.67 ± 0.33 MPa, 4.17 ± 0.59 MPa, and 4.19 ± 0.60 MPa. (3) The collapse indices including the displacement increments and peak von Mises stress decrements of type L2 and L3 models were markedly higher than those of type M, C, and L1 models (P < 0.001). Conclusions The collapse indices of the femoral heads of type L2 and L3 FE models were significantly higher than those of type M, C, and L1. Different areas of necrosis result in varied impact on the femoral head collapse. |
| first_indexed | 2024-12-21T01:14:51Z |
| format | Article |
| id | doaj.art-d0dcccf8ba964f498953aa2db51b73a3 |
| institution | Directory Open Access Journal |
| issn | 1471-2474 |
| language | English |
| last_indexed | 2024-12-21T01:14:51Z |
| publishDate | 2020-04-01 |
| publisher | BMC |
| record_format | Article |
| series | BMC Musculoskeletal Disorders |
| spelling | doaj.art-d0dcccf8ba964f498953aa2db51b73a32022-12-21T19:20:50ZengBMCBMC Musculoskeletal Disorders1471-24742020-04-012111810.1186/s12891-020-03242-0The effect of the necrotic area on the biomechanics of the femoral head - a finite element studyPengfei Wen0Yumin Zhang1Linjie Hao2Ju’an Yue3Jun Wang4Tao Wang5Wei Song6Wanshou Guo7Tao Ma8Department of Joint Surgery, Honghui Hospital, Xi’an Jiaotong UniversityDepartment of Joint Surgery, Honghui Hospital, Xi’an Jiaotong UniversityDepartment of Joint Surgery, Honghui Hospital, Xi’an Jiaotong UniversityDepartment of Orthopedics, Aviation General HospitalDepartment of Joint Surgery, Honghui Hospital, Xi’an Jiaotong UniversityDepartment of Joint Surgery, Honghui Hospital, Xi’an Jiaotong UniversityDepartment of Joint Surgery, Honghui Hospital, Xi’an Jiaotong UniversityCenter for Osteonecrosis and Joint Preserving & Reconstruction, Department of Orthopaedic Surgery, Beijing Key Laboratory of Arthritic and Rheumatic Diseases, China-Japan Friendship HospitalDepartment of Joint Surgery, Honghui Hospital, Xi’an Jiaotong UniversityAbstract Background Femoral head collapse is the key to the progress of osteonecrosis of the femoral head (ONFH), but the causes of collapse are not completely clear. The better understanding of the progress of femoral head collapse will guide the treatment strategy for ONFH patients. The purpose of this study was to evaluate the biomechanical influence of necrosis area on the collapse of the femoral head by finite element analysis. Methods CT and MRI data from the hip joint of a healthy volunteer were collected to establish a finite element (FE) model of a normal hip. Subsequently, five categories of osteonecrosis FE models were established by using the normal model and computer software according to China-Japan Friendship Hospital (CJFH) classification for ONFH. The CJFH system includes five types based on the size and location of necrosis lesions in the femoral head (type M, C, L1, L2, and L3) and the stage of ONFH. The collapse indices of each model were analyzed by FE method, including the displacement, peak von Mises stress and stress index of the simulated necrotic area as well as the lateral pillar contact area of the femoral head to acetabular. Results (1) The displacement increments in the simulated necrotic areas of type M, C, L1, L2, and L3 models were 3.75 μm, 8.24 μm, 8.47 μm, 18.42 μm, and 20.44 μm respectively; the peak von Mises stress decrements were 1.50 MPa, 3.74 MPa, 3.73 MPa, 4.91 MPa, and 4.92 MPa respectively; and the stress indices were 0.04, 0.08, 0.08, 0.27, and 0.27 respectively. (2) The displacement increments in the lateral pillar contact areas of five type models were significantly different (P < 0.001) and increased in sequence as follows: 1.93 ± 0.15 μm, 5.74 ± 0.92 μm, 5.84 ± 1.42 μm, 14.50 ± 3.00 μm, and 16.43 ± 3.05 μm. The peak von Mises stress decrements were also significantly different (P < 0.001) and increased in sequence as follows: 0.52 ± 0.30 MPa, 0.55 ± 0.12 MPa, 0.67 ± 0.33 MPa, 4.17 ± 0.59 MPa, and 4.19 ± 0.60 MPa. (3) The collapse indices including the displacement increments and peak von Mises stress decrements of type L2 and L3 models were markedly higher than those of type M, C, and L1 models (P < 0.001). Conclusions The collapse indices of the femoral heads of type L2 and L3 FE models were significantly higher than those of type M, C, and L1. Different areas of necrosis result in varied impact on the femoral head collapse.http://link.springer.com/article/10.1186/s12891-020-03242-0Osteonecrosis of the femoral headChina-Japan friendship hospital classificationFinite element analysisCollapse |
| spellingShingle | Pengfei Wen Yumin Zhang Linjie Hao Ju’an Yue Jun Wang Tao Wang Wei Song Wanshou Guo Tao Ma The effect of the necrotic area on the biomechanics of the femoral head - a finite element study BMC Musculoskeletal Disorders Osteonecrosis of the femoral head China-Japan friendship hospital classification Finite element analysis Collapse |
| title | The effect of the necrotic area on the biomechanics of the femoral head - a finite element study |
| title_full | The effect of the necrotic area on the biomechanics of the femoral head - a finite element study |
| title_fullStr | The effect of the necrotic area on the biomechanics of the femoral head - a finite element study |
| title_full_unstemmed | The effect of the necrotic area on the biomechanics of the femoral head - a finite element study |
| title_short | The effect of the necrotic area on the biomechanics of the femoral head - a finite element study |
| title_sort | effect of the necrotic area on the biomechanics of the femoral head a finite element study |
| topic | Osteonecrosis of the femoral head China-Japan friendship hospital classification Finite element analysis Collapse |
| url | http://link.springer.com/article/10.1186/s12891-020-03242-0 |
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