Department of Traumatology, Medisch Spectrum Twente, Enschede, The Netherlands.
Injury. 2009 Mar;40(3):283-7. doi: 10.1016/j.injury.2008.08.041. Epub 2009 Feb 3.
Internal fixation of intracapsular hip fractures results in a high failure rate with non-union and avascular necrosis being the two most important complications. In order to prevent these possible complications treatment should consist of an anatomical reduction and stable fixation by insertion of a low volume, dynamic implant, providing angular and rotational stability to the femoral head. According to these principles a new implant, the dynamic locking blade plate (DLBP) was designed for the fixation of intracapsular hip fractures. We performed a biomechanical analysis in synthetic bone to compare the rotational stability and cut out resistance of the DLBP with a conventional sliding hip screw (SHS) and the more recently developed Twin Hook. The rotational stability of the DLBP proved to be three times higher than the rotational stability of a SHS and two times higher than the Twin Hook. There was no major difference in cut out resistance between the different implants. The design of the DLBP and possible advantages with regard to the healing of an intracapsular hip fracture are discussed.
关节囊内髋关节骨折的内固定导致高失败率，其中不愈合和缺血性坏死是两个最重要的并发症。为了预防这些可能的并发症，治疗应包括解剖复位和通过插入低容量、动力植入物稳定固定，为股骨头提供角和旋转稳定性。根据这些原则，我们设计了一种新型植入物，即动力锁定刀片板（DLBP），用于固定关节囊内髋关节骨折。我们在合成骨中进行了生物力学分析，比较了 DLBP 与传统滑动髋螺钉（SHS）和最近开发的双钩的旋转稳定性和切出阻力。DLBP 的旋转稳定性证明比 SHS 的旋转稳定性高 3 倍，比 Twin Hook 高 2 倍。不同植入物之间的切出阻力没有明显差异。讨论了 DLBP 的设计和在关节囊内髋关节骨折愈合方面的可能优势。
