科研之友
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摘要
Objective: Our aim was to evaluate the biomechanicaI properties of the interosseous membrane (IOM) and radial head and investigate the pathomechanics of the Essex-Lopresti injury. Methods: Twelve adult fresh frozen upper limbs of human cadavers were chosen for test. First, the 12 intact specimens were mounted onto a materials testing machine to carry out biomechanical tests in pronation, supination and neutral positions, respectively. An axial load of 100 N was applied along the longitudinal axis of the forearm for 30 seconds in each position. Then, the twelve specimens were randomly divided into two groups. The radial head was resected in 6 specimens. And the central band of TOM was severed in another 6 specimens. Each group was tested by the same method. Finally, both the radial head and the TOM were excised in all specimens and biomechanical tests were performed. Results: The rotational position of the forearm or simple severance of the IOM had no effect on longitudinal displacement. The radial longitudinal displacement increased significantly after resection of the radial head. The severance of the TOM had no effect on compressive stiffness of the radius. However, compressive stiffness of the radius decreased significantly after resection of the radial head. Conclusion: The radial head fracture combined with the TOM injury was the most important cause of the Essex-Lopresti injury, and the radial head fracture was the major factor. The TOM was the major structure to maintain the longitudinal stability of the forearm after resection of the radial head.
- 出版日期2013-4
- 单位温州医科大学
