The effects of additional hollow cylinder coated to external fixator screws for treating pilon fracture: A biomechanical perspective
An external fixator is a promising medical device that could provide optimum stability and reduce the rate of complications in treating bone fracture during intervention period. It is noted that the biomechanics behaviour of device can be altered by introducing more features such as material suitabi...
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| Format: | Article |
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Elsevier Ltd
2021
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| _version_ | 1796866242075688960 |
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| author | Ramlee, Muhammad Hanif Seng, Gan Hong Ros Felip, Antonio Abdul Kadir, Mohammed Rafiq |
| author_facet | Ramlee, Muhammad Hanif Seng, Gan Hong Ros Felip, Antonio Abdul Kadir, Mohammed Rafiq |
| author_sort | Ramlee, Muhammad Hanif |
| collection | ePrints |
| description | An external fixator is a promising medical device that could provide optimum stability and reduce the rate of complications in treating bone fracture during intervention period. It is noted that the biomechanics behaviour of device can be altered by introducing more features such as material suitability and additional components. Therefore, this study was conducted via finite element method to investigate the effects of additional hollow cylinder coated with external fixator screws in treating Type III pilon fracture. Finite element models which have been validated with experimental data were used to simulate stresses at the pin-bone interface and relative micromovement at interfragmentary fractures during swing (70 N load) and stance phases (350 N load). All bones and external fixators were assigned with isotropic material properties while the cartilages were simulated with hyper-elastic. For the hollow cylinder, polyethylene was assigned due to its properties which are equivalent to the bone. From the results, it is found that stresses at the pin-bone interface for the coated screws were reduced to 54% as compared to the conventional fixator. For the micromovement, there was no difference between both models, whereby the value was 0.03 mm. The results supported previously published literature, in which high stresses are unavoidable at the interface, fortunately, those stresses did not exceed the ultimate strength of bone, which is safe for treating patients. In conclusion, if patients are allowed to bear weight bearing, the external fixator with coated screws is a more favourable option to be fixed into the bone to avoid complications at the interface. |
| first_indexed | 2024-03-05T21:09:12Z |
| format | Article |
| id | utm.eprints-96528 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T21:09:12Z |
| publishDate | 2021 |
| publisher | Elsevier Ltd |
| record_format | dspace |
| spelling | utm.eprints-965282022-07-26T08:41:04Z http://eprints.utm.my/96528/ The effects of additional hollow cylinder coated to external fixator screws for treating pilon fracture: A biomechanical perspective Ramlee, Muhammad Hanif Seng, Gan Hong Ros Felip, Antonio Abdul Kadir, Mohammed Rafiq RD Surgery An external fixator is a promising medical device that could provide optimum stability and reduce the rate of complications in treating bone fracture during intervention period. It is noted that the biomechanics behaviour of device can be altered by introducing more features such as material suitability and additional components. Therefore, this study was conducted via finite element method to investigate the effects of additional hollow cylinder coated with external fixator screws in treating Type III pilon fracture. Finite element models which have been validated with experimental data were used to simulate stresses at the pin-bone interface and relative micromovement at interfragmentary fractures during swing (70 N load) and stance phases (350 N load). All bones and external fixators were assigned with isotropic material properties while the cartilages were simulated with hyper-elastic. For the hollow cylinder, polyethylene was assigned due to its properties which are equivalent to the bone. From the results, it is found that stresses at the pin-bone interface for the coated screws were reduced to 54% as compared to the conventional fixator. For the micromovement, there was no difference between both models, whereby the value was 0.03 mm. The results supported previously published literature, in which high stresses are unavoidable at the interface, fortunately, those stresses did not exceed the ultimate strength of bone, which is safe for treating patients. In conclusion, if patients are allowed to bear weight bearing, the external fixator with coated screws is a more favourable option to be fixed into the bone to avoid complications at the interface. Elsevier Ltd 2021 Article PeerReviewed Ramlee, Muhammad Hanif and Seng, Gan Hong and Ros Felip, Antonio and Abdul Kadir, Mohammed Rafiq (2021) The effects of additional hollow cylinder coated to external fixator screws for treating pilon fracture: A biomechanical perspective. Injury, 52 (8). pp. 2131-2141. ISSN 0020-1383 http://dx.doi.org/10.1016/j.injury.2021.03.017 DOI:10.1016/j.injury.2021.03.017 |
| spellingShingle | RD Surgery Ramlee, Muhammad Hanif Seng, Gan Hong Ros Felip, Antonio Abdul Kadir, Mohammed Rafiq The effects of additional hollow cylinder coated to external fixator screws for treating pilon fracture: A biomechanical perspective |
| title | The effects of additional hollow cylinder coated to external fixator screws for treating pilon fracture: A biomechanical perspective |
| title_full | The effects of additional hollow cylinder coated to external fixator screws for treating pilon fracture: A biomechanical perspective |
| title_fullStr | The effects of additional hollow cylinder coated to external fixator screws for treating pilon fracture: A biomechanical perspective |
| title_full_unstemmed | The effects of additional hollow cylinder coated to external fixator screws for treating pilon fracture: A biomechanical perspective |
| title_short | The effects of additional hollow cylinder coated to external fixator screws for treating pilon fracture: A biomechanical perspective |
| title_sort | effects of additional hollow cylinder coated to external fixator screws for treating pilon fracture a biomechanical perspective |
| topic | RD Surgery |
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