| Autor: |
Scott, Rutherford, Ryan M, Demianiuk, Jérôme, Benamou, Clifford, Beckett, Malcolm G, Ness, Loïc M, Déjardin |
| Rok vydání: |
2015 |
| Předmět: |
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| Zdroj: |
Veterinary surgery : VS. 44(6) |
| ISSN: |
1532-950X |
| Popis: |
To evaluate the effect of intramedullary rod (IMR) diameter on the mechanical behavior of string of pearls (SOP) plate-rod constructs.In vitro mechanical study.Synthetic bone models (n = 24).Locking 3.5 mm SOP plates were fixed to a tibial bone model with a 50 mm fracture gap. Four experimental groups (n = 4) were tested: monocortical SOP construct alone and monocortical SOP constructs augmented with a 2.4, 3.2, or 4.0 mm IMR corresponding to 24, 32, or 40% filling of the medullary cavity diameter (SOP-24, SOP-32, SOP-40). Control groups (n = 4) were stabilized with either a bicortical SOP plate (SOP-B) or a 3.5 mm limited contact dynamic compression plate (LC-DCP) with a 4.0 mm IMR filling 40% of the medullary cavity diameter (LC-DCP-40). Specimens were tested in mediolateral bending. Construct compliance (CC) and angular deformation (AD) were compared between construct types (P .05).CC and AD incrementally decreased with increasing IMR diameter (P .001). There were no statistical differences between SOP-24 and SOP-B (P = .806) or between SOP-32 and LC-DCP-40 (P = .773), which was also the least compliant of all constructs (P .001). AD followed an identical pattern of significance.Biological osteosynthesis often relies on more compliant bridging constructs to promote beneficial micromotion at the fracture. Our study suggests use of a smaller diameter IMR (SOP-32) is comparable to a conventional plate-rod construct (LC-DCP-40). Should greater compliance be desired, an even smaller diameter IMR (SOP-24) may prove beneficial while as stable as an accepted bicortical construct (SOP-B). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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