دورية أكاديمية
Wrist movements induce torque and lever force in the scaphoid: an ex vivo study
| العنوان: | Wrist movements induce torque and lever force in the scaphoid: an ex vivo study |
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| المؤلفون: | Jochen Erhart, Ewald Unger, Philip Schefzig, Peter Varga, Michael Hagmann, Robin Ristl, Stefan Hajdu, Anna Gormasz, Patrick Sadoghi, Winfried Mayr |
| المصدر: | Journal of Orthopaedic Surgery and Research, Vol 15, Iss 1, Pp 1-10 (2020) |
| بيانات النشر: | BMC, 2020. |
| سنة النشر: | 2020 |
| المجموعة: | LCC:Orthopedic surgery LCC:Diseases of the musculoskeletal system |
| مصطلحات موضوعية: | Scaphoid fracture, Biomechanics, Wrist movement, Torque and lever force, Orthopedic surgery, RD701-811, Diseases of the musculoskeletal system, RC925-935 |
| الوصف: | Abstract Purpose We hypothesised that intercarpal K-wire fixation of adjacent carpal bones would reduce torque and lever force within a fractured scaphoid bone. Methods In eight cadaver wrists, a scaphoid osteotomy was stabilised using a locking nail, which also functioned as a sensor to measure isometric torque and lever forces between the fragments. The wrist was moved through 80% of full range of motion (ROM) to generate torque and force within the scaphoid. Testing was performed with and without loading of the wrist and K-wire stabilisation of the adjacent carpal bones. Results Average torque and lever force values were 49.6 ± 25.1 Nmm and 3.5 ± 0.9 N during extension and 41 ± 26.7 Nmm and 8.1 ± 2.8 N during flexion. Torque and lever force did not depend on scaphoid size, individual wrist ROM, or deviations of the sensor versus the anatomic axis. K-wire fixation did not produce significant changes in average torque and lever force values except with wrist radial abduction (P = 0.0485). Other than wrist extension, torque direction was not predictable. Conclusion In unstable scaphoid fractures, we suggest securing rotational stability with selected implants for functional postoperative care. Wrist ROM within 20% extension and radial abduction to 50% flexion limit torque and lever force exacerbation between scaphoid fragments. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1749-799X |
| Relation: | http://link.springer.com/article/10.1186/s13018-020-01897-y; https://doaj.org/toc/1749-799X |
| DOI: | 10.1186/s13018-020-01897-y |
| URL الوصول: | https://doaj.org/article/009cd3def8484641b676d36af92dde3e |
| رقم الأكسشن: | edsdoj.009cd3def8484641b676d36af92dde3e |
| قاعدة البيانات: | Directory of Open Access Journals |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 1749799X |
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| DOI: | 10.1186/s13018-020-01897-y |