<div class="csl-bib-body">
<div class="csl-entry">Baumbach, S. F., Dall´Ara, E., Weninger, P., Antoni, A., Traxler, H., Dörr, M., & Zysset, P. K. (2012). Assessment of a Novel Biomechanical Fracture Model for Distal Radius Fractures. <i>BMC Musculoskeletal Disorders</i>, <i>13</i>(252). https://doi.org/10.1186/1471-2474-13-252</div>
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dc.identifier.issn
1471-2474
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dc.identifier.uri
http://hdl.handle.net/20.500.12708/164984
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dc.description.abstract
Background
Distal radius fractures (DRF) are one of the most common fractures and often need surgical treatment, which has been validated through biomechanical tests. Currently a number of different fracture models are used, none of which resemble the in vivo fracture location. The aim of the study was to develop a new standardized fracture model for DRF (AO-23.A3) and compare its biomechanical behavior to the current gold standard.
Methods
Variable angle locking volar plates (ADAPTIVE, Medartis) were mounted on 10 pairs of fresh-frozen radii. The osteotomy location was alternated within each pair (New: 10 mm wedge 8 mm / 12 mm proximal to the dorsal / volar apex of the articular surface; Gold standard: 10 mm wedge 20 mm proximal to the articular surface). Each specimen was tested in cyclic axial compression (increasing load by 100 N per cycle) until failure or −3 mm displacement. Parameters assessed were stiffness, displacement and dissipated work calculated for each cycle and ultimate load. Significance was tested using a linear mixed model and Wald test as well as t-tests.
Results
7 female and 3 male pairs of radii aged 74 ± 9 years were tested. In most cases (7/10), the two groups showed similar mechanical behavior at low loads with increasing differences at increasing loads. Overall the novel fracture model showed a significant different biomechanical behavior than the gold standard model (p < 0,001). The average final loads resisted were significantly lower in the novel model (860 N ± 232 N vs. 1250 N ± 341 N; p = 0.001).
Conclusion
The novel biomechanical fracture model for DRF more closely mimics the in vivo fracture site and shows a significantly different biomechanical behavior with increasing loads when compared to the current gold standard.
en
dc.language.iso
en
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dc.publisher
BMC
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dc.relation.ispartof
BMC Musculoskeletal Disorders
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dc.subject
Orthopedics and Sports Medicine
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dc.subject
Rheumatology
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dc.title
Assessment of a Novel Biomechanical Fracture Model for Distal Radius Fractures