Establishment of a finite element model and stress analysis of intra-articular impacted fragments in posterior malleolar fractures
Abstract Background Intra-articular impacted fragments (IAIFs) are considered articular surface fragments resulting from impact and compressive forces. The malreduction of IAIFs in posterior malleolar fractures has been associated with talar subluxation and long-term post-traumatic arthritis. In thi...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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BMC
2022-03-01
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| Series: | Journal of Orthopaedic Surgery and Research |
| Subjects: | |
| Online Access: | https://doi.org/10.1186/s13018-022-03043-2 |
| _version_ | 1817992302115684352 |
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| author | Wenyong Xie Hao Lu Sizheng Zhan Yijun Liu Yuan Quan Hailin Xu Zhongguo Fu Dianying Zhang |
| author_facet | Wenyong Xie Hao Lu Sizheng Zhan Yijun Liu Yuan Quan Hailin Xu Zhongguo Fu Dianying Zhang |
| author_sort | Wenyong Xie |
| collection | DOAJ |
| description | Abstract Background Intra-articular impacted fragments (IAIFs) are considered articular surface fragments resulting from impact and compressive forces. The malreduction of IAIFs in posterior malleolar fractures has been associated with talar subluxation and long-term post-traumatic arthritis. In this study, we establish IAIF defect finite element models of different sizes in posterior malleolar fractures and explored how IAIF defects predict the onset of post-traumatic arthritis. Methods A reliable three-dimensional finite element model of the normal ankle was established. Finite element models with different sizes of IAIF defects were created to calculate ankle joint contact stress. The finite element data were recorded and analyzed. Results There was a linear relationship between the size of the IAIF defect and MCS with IAIF defects in the posterolateral region. The result of Pearson linear correlation analysis was r = 0.963, P = 0.009. The regression equation was MCS = 0.087*AI + 2.951 (AI, area of IAIF) by simple linear regression analysis. When the IAIF defect was in the posteromedial region, there was also a linear relationship between the size of the IAIF defect and MCS. The result of Pearson linear correlation analysis was r = 908, P = 0.033. The regression equation was MCS = 0.065*AI + 1.841. The MCS was increased mainly in the border of the IAIF defect. Conclusions A small IAIF defect in the posterior malleolus will result in a high MCS, and the MCS in the posterolateral region is larger than the MCS in the posteromedial region when the size of the IAIF defect is the same. We obtain the regression equation of MCS and area of IAIF defect. This indicates that patients are more prone to post-trauma arthritis when the size of IAIF defects is more than 17.8 mm2 in the posterolateral region and more than 40.9 mm2 in the posteromedial region. Trial registration Retrospectively registered. |
| first_indexed | 2024-04-14T01:24:33Z |
| format | Article |
| id | doaj.art-8affff0eb1e34f40bde631ab243b4ec4 |
| institution | Directory Open Access Journal |
| issn | 1749-799X |
| language | English |
| last_indexed | 2024-04-14T01:24:33Z |
| publishDate | 2022-03-01 |
| publisher | BMC |
| record_format | Article |
| series | Journal of Orthopaedic Surgery and Research |
| spelling | doaj.art-8affff0eb1e34f40bde631ab243b4ec42022-12-22T02:20:31ZengBMCJournal of Orthopaedic Surgery and Research1749-799X2022-03-011711610.1186/s13018-022-03043-2Establishment of a finite element model and stress analysis of intra-articular impacted fragments in posterior malleolar fracturesWenyong Xie0Hao Lu1Sizheng Zhan2Yijun Liu3Yuan Quan4Hailin Xu5Zhongguo Fu6Dianying Zhang7Department of Orthopedics and Trauma, Peking University People’s HospitalDepartment of Orthopedics and Trauma, Peking University People’s HospitalDepartment of Orthopedics and Trauma, Peking University People’s HospitalDepartment of Foot and Ankle Surgery, Center for Orthopaedic Surgery, The Third Affiliated Hospital of Southern Medical UniversityDepartment of Orthopedics and Trauma, Peking University People’s HospitalDepartment of Orthopedics and Trauma, Peking University People’s HospitalDepartment of Orthopedics and Trauma, Peking University People’s HospitalDepartment of Orthopedics and Trauma, Peking University People’s HospitalAbstract Background Intra-articular impacted fragments (IAIFs) are considered articular surface fragments resulting from impact and compressive forces. The malreduction of IAIFs in posterior malleolar fractures has been associated with talar subluxation and long-term post-traumatic arthritis. In this study, we establish IAIF defect finite element models of different sizes in posterior malleolar fractures and explored how IAIF defects predict the onset of post-traumatic arthritis. Methods A reliable three-dimensional finite element model of the normal ankle was established. Finite element models with different sizes of IAIF defects were created to calculate ankle joint contact stress. The finite element data were recorded and analyzed. Results There was a linear relationship between the size of the IAIF defect and MCS with IAIF defects in the posterolateral region. The result of Pearson linear correlation analysis was r = 0.963, P = 0.009. The regression equation was MCS = 0.087*AI + 2.951 (AI, area of IAIF) by simple linear regression analysis. When the IAIF defect was in the posteromedial region, there was also a linear relationship between the size of the IAIF defect and MCS. The result of Pearson linear correlation analysis was r = 908, P = 0.033. The regression equation was MCS = 0.065*AI + 1.841. The MCS was increased mainly in the border of the IAIF defect. Conclusions A small IAIF defect in the posterior malleolus will result in a high MCS, and the MCS in the posterolateral region is larger than the MCS in the posteromedial region when the size of the IAIF defect is the same. We obtain the regression equation of MCS and area of IAIF defect. This indicates that patients are more prone to post-trauma arthritis when the size of IAIF defects is more than 17.8 mm2 in the posterolateral region and more than 40.9 mm2 in the posteromedial region. Trial registration Retrospectively registered.https://doi.org/10.1186/s13018-022-03043-2Finite element analysisAnkle fracturesPosterior malleolusIntra-articular fragmentPost-traumatic arthritis |
| spellingShingle | Wenyong Xie Hao Lu Sizheng Zhan Yijun Liu Yuan Quan Hailin Xu Zhongguo Fu Dianying Zhang Establishment of a finite element model and stress analysis of intra-articular impacted fragments in posterior malleolar fractures Journal of Orthopaedic Surgery and Research Finite element analysis Ankle fractures Posterior malleolus Intra-articular fragment Post-traumatic arthritis |
| title | Establishment of a finite element model and stress analysis of intra-articular impacted fragments in posterior malleolar fractures |
| title_full | Establishment of a finite element model and stress analysis of intra-articular impacted fragments in posterior malleolar fractures |
| title_fullStr | Establishment of a finite element model and stress analysis of intra-articular impacted fragments in posterior malleolar fractures |
| title_full_unstemmed | Establishment of a finite element model and stress analysis of intra-articular impacted fragments in posterior malleolar fractures |
| title_short | Establishment of a finite element model and stress analysis of intra-articular impacted fragments in posterior malleolar fractures |
| title_sort | establishment of a finite element model and stress analysis of intra articular impacted fragments in posterior malleolar fractures |
| topic | Finite element analysis Ankle fractures Posterior malleolus Intra-articular fragment Post-traumatic arthritis |
| url | https://doi.org/10.1186/s13018-022-03043-2 |
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