Katolik Leonid I, Stewart Mark, Fernandez John, MacLennan Allison, Cohen Mark
Department of Orthopaedic Surgery, Thomas Jefferson University School of Medicine, Philadelphia, Pennsylvania, USA.
Am J Orthop (Belle Mead NJ). 2008 Sep;37(9):462-5.
The small AO (Synthes, Paoli, Pa) external fixator is a valuable tool for the treatment of distal radius fractures. The construct has many possible bar and pin configurations. However, there are no data regarding which construct is optimal with respect to strength and versatility. We tested 10 configurations to determine bending stiffness, rotation, and axial loading. Although slight variations were found between constructs for bending and rotation forces, there were marked differences between constructs during axial loading. A frame design without bar-to-bar clamps was determined stiffest. However, this configuration may be more difficult to apply and adjust in the clinical setting. Although an "ideal" construct applicable to all fracture types does not exist, knowledge of the strengths of various configurations may allow for optimization of fixator assembly to meet specific clinical needs.
小型AO（辛迪斯公司，保利，宾夕法尼亚州）外固定器是治疗桡骨远端骨折的一种有价值的工具。该结构有许多可能的连接杆和钢针配置。然而，关于哪种结构在强度和通用性方面是最佳的，尚无相关数据。我们测试了10种配置，以确定其弯曲刚度、旋转情况和轴向载荷。虽然在弯曲力和旋转力方面，不同结构之间存在细微差异，但在轴向载荷过程中，不同结构之间存在显著差异。一种没有杆与杆夹的框架设计被确定为刚度最大。然而，这种配置在临床环境中可能更难应用和调整。虽然不存在适用于所有骨折类型的“理想”结构，但了解各种配置的优势可能有助于优化固定器组件，以满足特定的临床需求。
