Biomechanical Assessment of Three Osteosynthesis Constructs by Periprosthetic Humerus Fractures
Background. Biomechanical stability assessment of 3 different constructs for proximal fixation of a locking compression plate (LCP) in treating a Worland type C periprosthetic fracture after total shoulder arthroplasty. Methods. 27 Worland type C fractures after shoulder arthroplasty in synthetic hu...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Orthopedics |
| Online Access: | http://dx.doi.org/10.1155/2020/8872419 |
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| author | Afif Harb Bastian Welke Emmanouil Liodakis Sam Razaeian Dafang Zhang Christian Krettek Christof Hurschler Nael Hawi |
| author_facet | Afif Harb Bastian Welke Emmanouil Liodakis Sam Razaeian Dafang Zhang Christian Krettek Christof Hurschler Nael Hawi |
| author_sort | Afif Harb |
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| description | Background. Biomechanical stability assessment of 3 different constructs for proximal fixation of a locking compression plate (LCP) in treating a Worland type C periprosthetic fracture after total shoulder arthroplasty. Methods. 27 Worland type C fractures after shoulder arthroplasty in synthetic humeri were treated with 14-hole LCP that is proximally fixed using the following: (1) 1 × 1.5 mm cerclage wires and 2x unicortical-locking screws, (2) 3 × 1.5 mm cerclage wires, or (3) 2x bicortical-locking attachment plates. Torsional stiffness was assessed by applying an internal rotation moment of 5 Nm and then after unloading the specimen, an external rotation moment of 5 Nm at the same rate was applied. Axial stiffness was assessed by applying a 50 N preload, and then applying a cyclic load of 250 N, then increasing the load by 50 N each time, until a maximum axial load of 2500 N was reached or specimen failure occurred. Results. With regard to internal as well as external rotational stiffness, group 1 showed a mean stiffness of 0.37 Nm/deg and 0.57 Nm/deg, respectively, group 2 had a mean stiffness of 0.51 Nm/deg and 0.39 Nm/deg, respectively, while group 3 had a mean stiffness of 1.34 Nm/deg and 1.31 Nm/deg, respectively. Concerning axial stiffness, group 1 showed an average stiffness of 451.0 N/mm, group 2 had a mean stiffness of 737.5 N/mm, whereas group 3 had a mean stiffness of 715.8 N/mm. Conclusion. Group 3 displayed a significantly higher torsional stiffness while a comparable axial stiffness to group 2. |
| format | Article |
| id | doaj-art-678dcf7000ba41388560a04d174decaf |
| institution | Kabale University |
| issn | 2090-3464 2090-3472 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Orthopedics |
| spelling | doaj-art-678dcf7000ba41388560a04d174decaf2025-02-03T01:04:29ZengWileyAdvances in Orthopedics2090-34642090-34722020-01-01202010.1155/2020/88724198872419Biomechanical Assessment of Three Osteosynthesis Constructs by Periprosthetic Humerus FracturesAfif Harb0Bastian Welke1Emmanouil Liodakis2Sam Razaeian3Dafang Zhang4Christian Krettek5Christof Hurschler6Nael Hawi7Trauma Department, Hannover Medical School (MHH), Carl-Neuberg-Str. 1, Hannover 30625, GermanyLaboratory for Biomechanics and Biomaterials, Department of Orthopaedic Surgery, Hannover Medical School, Hannover, GermanyTrauma Department, Hannover Medical School (MHH), Carl-Neuberg-Str. 1, Hannover 30625, GermanyTrauma Department, Hannover Medical School (MHH), Carl-Neuberg-Str. 1, Hannover 30625, GermanyDepartment of Orthopaedic Surgery, Brigham and Women’s Hospital, 75 Francis St, Boston, MA 02115, USATrauma Department, Hannover Medical School (MHH), Carl-Neuberg-Str. 1, Hannover 30625, GermanyLaboratory for Biomechanics and Biomaterials, Department of Orthopaedic Surgery, Hannover Medical School, Hannover, GermanyTrauma Department, Hannover Medical School (MHH), Carl-Neuberg-Str. 1, Hannover 30625, GermanyBackground. Biomechanical stability assessment of 3 different constructs for proximal fixation of a locking compression plate (LCP) in treating a Worland type C periprosthetic fracture after total shoulder arthroplasty. Methods. 27 Worland type C fractures after shoulder arthroplasty in synthetic humeri were treated with 14-hole LCP that is proximally fixed using the following: (1) 1 × 1.5 mm cerclage wires and 2x unicortical-locking screws, (2) 3 × 1.5 mm cerclage wires, or (3) 2x bicortical-locking attachment plates. Torsional stiffness was assessed by applying an internal rotation moment of 5 Nm and then after unloading the specimen, an external rotation moment of 5 Nm at the same rate was applied. Axial stiffness was assessed by applying a 50 N preload, and then applying a cyclic load of 250 N, then increasing the load by 50 N each time, until a maximum axial load of 2500 N was reached or specimen failure occurred. Results. With regard to internal as well as external rotational stiffness, group 1 showed a mean stiffness of 0.37 Nm/deg and 0.57 Nm/deg, respectively, group 2 had a mean stiffness of 0.51 Nm/deg and 0.39 Nm/deg, respectively, while group 3 had a mean stiffness of 1.34 Nm/deg and 1.31 Nm/deg, respectively. Concerning axial stiffness, group 1 showed an average stiffness of 451.0 N/mm, group 2 had a mean stiffness of 737.5 N/mm, whereas group 3 had a mean stiffness of 715.8 N/mm. Conclusion. Group 3 displayed a significantly higher torsional stiffness while a comparable axial stiffness to group 2.http://dx.doi.org/10.1155/2020/8872419 |
| spellingShingle | Afif Harb Bastian Welke Emmanouil Liodakis Sam Razaeian Dafang Zhang Christian Krettek Christof Hurschler Nael Hawi Biomechanical Assessment of Three Osteosynthesis Constructs by Periprosthetic Humerus Fractures Advances in Orthopedics |
| title | Biomechanical Assessment of Three Osteosynthesis Constructs by Periprosthetic Humerus Fractures |
| title_full | Biomechanical Assessment of Three Osteosynthesis Constructs by Periprosthetic Humerus Fractures |
| title_fullStr | Biomechanical Assessment of Three Osteosynthesis Constructs by Periprosthetic Humerus Fractures |
| title_full_unstemmed | Biomechanical Assessment of Three Osteosynthesis Constructs by Periprosthetic Humerus Fractures |
| title_short | Biomechanical Assessment of Three Osteosynthesis Constructs by Periprosthetic Humerus Fractures |
| title_sort | biomechanical assessment of three osteosynthesis constructs by periprosthetic humerus fractures |
| url | http://dx.doi.org/10.1155/2020/8872419 |
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