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KMID : 0386420100230020220
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Journal of the Korean Fracture Society
2010 Volume.23 No. 2 p.220 ~ p.226
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Effect of Fracture Gap on Biomechanical Stability of Compression Bone-Plate Fixation System after Bone Fracture Augmentation
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Jung Duk-Young
Kim Seon-Chil
Oh Jong-Keon
Lee Sung-Jae
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Abstract
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Purpose: The goal of this study using the biomechanical test was to evaluate the mechanical stability of the bone-plate fixation system according to changes of the fracture gap sizes and widths.
Materials and Methods: For mechanical test, four types with different fracture models simulating the clinical situations were constructed depending on the gap size (FGS, mm) and the gap width (FGW, %) at the fracture site: 0 mm/0%, 1 mm/100%, 4 mm/100%, 4 mm/50%. For analyzing the effects of fracture gap on the biomechanical stability of the bone-plate fixation system, 4-point bending test was performed under all same conditions.
Results: It was found that the fracture gap sizes of 1 and 4 mm decreased mechanical stiffness by about 50∼60% or more. Furthermore, even without fracture gap size, 50% or more fracture gap width considerably decreased mechanical stiffness and suggested the possibility of plate damage through strain results.
Conclusion: Our findings suggested that at least 50% contact of the fracture faces in a fracture surgery would be maintained to increase the mechanical stability of the bone-plate fixation system.
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KEYWORD
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Bone fracture, LC-DCP, Fracture gap and width, Biomechanical stability
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