Improving Equine Intramedullary Nail Osteosynthesis via Fracture Adjacent Polymer Reinforcement
Introduction: Osteosynthesis of the equine femur is still a challenge for veterinary medicine. Even though intramedullary fracture fixation is possible nowadays, the varying geometry of the medullary cavity along the bone axis is a critical factor. Limited contact area between implant and bone can c...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2022-09-01
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| Series: | Current Directions in Biomedical Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/cdbme-2022-1034 |
| _version_ | 1797947885241761792 |
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| author | Lang Jan J. Baylacher Veronika Micheler Carina M. Wilhelm Nikolas J. Hinterwimmer Florian Schwaiger Benedikt Barnewitz Dirk Eisenhart-Rothe Rüdiger von Grosse Christian U. Burgkart Rainer |
| author_facet | Lang Jan J. Baylacher Veronika Micheler Carina M. Wilhelm Nikolas J. Hinterwimmer Florian Schwaiger Benedikt Barnewitz Dirk Eisenhart-Rothe Rüdiger von Grosse Christian U. Burgkart Rainer |
| author_sort | Lang Jan J. |
| collection | DOAJ |
| description | Introduction: Osteosynthesis of the equine femur is still a challenge for veterinary medicine. Even though intramedullary fracture fixation is possible nowadays, the varying geometry of the medullary cavity along the bone axis is a critical factor. Limited contact area between implant and bone can cause insufficient primary stability. In this study, it was investigated whether the osteosynthesis stability can be improved with a form-adaptive reinforcement for the diaphyseal part of the proximal fragment. Material and Methods: Eight equine femora were fitted with intramedullary nail osteosynthesis and analyzed by 4-point bending. Virtual position planning of the ex-vivo implantation using CT-data increased comparability. For five femora the proximal fragment was reinforced with a flexible polymer mixture. Longterm stability was tested via cyclic loading. Bending stiffness and its development due to cyclic loading was evaluated before and after reinforcement procedure. Finally, load-to-failure was tested in the same setup. Results and Discussion: The application of the polymer reinforcement increased the maximum torque in the load-tofailure measurement by 26%. Bending stiffness was not affected in the measured loading range by the reinforcement. Cyclic loading increased bending stiffness for a conditioned state but showed to be reversible for the most part. Conclusion: The fracture adjacent reinforcement showed to be beneficial to the osteosynthesis stability, but further investigation is necessary for surgical application. |
| first_indexed | 2024-04-10T21:33:38Z |
| format | Article |
| id | doaj.art-546fe8eeddb9448a84495287e68db075 |
| institution | Directory Open Access Journal |
| issn | 2364-5504 |
| language | English |
| last_indexed | 2024-04-10T21:33:38Z |
| publishDate | 2022-09-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Current Directions in Biomedical Engineering |
| spelling | doaj.art-546fe8eeddb9448a84495287e68db0752023-01-19T12:47:02ZengDe GruyterCurrent Directions in Biomedical Engineering2364-55042022-09-018212913210.1515/cdbme-2022-1034Improving Equine Intramedullary Nail Osteosynthesis via Fracture Adjacent Polymer ReinforcementLang Jan J.0Baylacher Veronika1Micheler Carina M.2Wilhelm Nikolas J.3Hinterwimmer Florian4Schwaiger Benedikt5Barnewitz Dirk6Eisenhart-Rothe Rüdiger von7Grosse Christian U.8Burgkart Rainer9Department of Orthopedics and Sports Orthopedics, School of Medicine and Chair of Non-destructive Testing, School of Engineering and Design, Technical University of Munich (TUM),Munich, GermanyDepartment of Orthopedics and Sports Orthopedics, School of Medicine, TUM,Munich, GermanyDepartment of Orthopedics and Sports Orthopedics, School of Medicine, TUM,Munich, GermanyDepartment of Orthopedics and Sports Orthopedics, School of Medicine, TUM,Munich, GermanyDepartment of Orthopedics and Sports Orthopedics, School of Medicine, TUM,Munich, GermanyDepartment of Diagnostic and Interventional Neuroradiology, School of Medicine, TUM,Munich, GermanyResearch Centre of Medical Technology and Biotechnology,Bad Langensalza, GermanyDepartment of Orthopedics and Sports Orthopedics, School of Medicine, TUM,Munich, GermanyChair of Non-destructive Testing, Department of Mechanical Engineering, TUM,Munich, GermanyDepartment of Orthopedics and Sports Orthopedics, School of Medicine, TUM,Munich, GermanyIntroduction: Osteosynthesis of the equine femur is still a challenge for veterinary medicine. Even though intramedullary fracture fixation is possible nowadays, the varying geometry of the medullary cavity along the bone axis is a critical factor. Limited contact area between implant and bone can cause insufficient primary stability. In this study, it was investigated whether the osteosynthesis stability can be improved with a form-adaptive reinforcement for the diaphyseal part of the proximal fragment. Material and Methods: Eight equine femora were fitted with intramedullary nail osteosynthesis and analyzed by 4-point bending. Virtual position planning of the ex-vivo implantation using CT-data increased comparability. For five femora the proximal fragment was reinforced with a flexible polymer mixture. Longterm stability was tested via cyclic loading. Bending stiffness and its development due to cyclic loading was evaluated before and after reinforcement procedure. Finally, load-to-failure was tested in the same setup. Results and Discussion: The application of the polymer reinforcement increased the maximum torque in the load-tofailure measurement by 26%. Bending stiffness was not affected in the measured loading range by the reinforcement. Cyclic loading increased bending stiffness for a conditioned state but showed to be reversible for the most part. Conclusion: The fracture adjacent reinforcement showed to be beneficial to the osteosynthesis stability, but further investigation is necessary for surgical application.https://doi.org/10.1515/cdbme-2022-1034osteosynthesisimplantequinebiomechanical testingfemurinternal fixationintramedullary nail |
| spellingShingle | Lang Jan J. Baylacher Veronika Micheler Carina M. Wilhelm Nikolas J. Hinterwimmer Florian Schwaiger Benedikt Barnewitz Dirk Eisenhart-Rothe Rüdiger von Grosse Christian U. Burgkart Rainer Improving Equine Intramedullary Nail Osteosynthesis via Fracture Adjacent Polymer Reinforcement Current Directions in Biomedical Engineering osteosynthesis implant equine biomechanical testing femur internal fixation intramedullary nail |
| title | Improving Equine Intramedullary Nail Osteosynthesis via Fracture Adjacent Polymer Reinforcement |
| title_full | Improving Equine Intramedullary Nail Osteosynthesis via Fracture Adjacent Polymer Reinforcement |
| title_fullStr | Improving Equine Intramedullary Nail Osteosynthesis via Fracture Adjacent Polymer Reinforcement |
| title_full_unstemmed | Improving Equine Intramedullary Nail Osteosynthesis via Fracture Adjacent Polymer Reinforcement |
| title_short | Improving Equine Intramedullary Nail Osteosynthesis via Fracture Adjacent Polymer Reinforcement |
| title_sort | improving equine intramedullary nail osteosynthesis via fracture adjacent polymer reinforcement |
| topic | osteosynthesis implant equine biomechanical testing femur internal fixation intramedullary nail |
| url | https://doi.org/10.1515/cdbme-2022-1034 |
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