Abstract

Objective This study aimed to compare the biomechanical characteristics of two conical coupling plate (CCP) constructs in an ex vivo feline tibial fracture gap model.

Study Design Paired tibiae harvested from eight recently euthanatized cats were alternately assigned to one of two stabilization groups. One tibia was stabilized with a standard, 6-hole, 2.5-mm CCP and the contralateral tibia was stabilized with a 6-hole, 2.5-mm prototype CCP (pCCP). Non-destructive cyclic four-point craniocaudal bending, mediolateral bending and axial compression testing were performed, and stiffness was recorded. The specimens were then loaded to failure in axial compression, and yield and failure loads were recorded.

Results During non-destructive testing, the pCCP constructs were significantly stiffer than the CCP constructs in both modes of bending and axial loading. Both constructs demonstrated significantly greater craniocaudal bending stiffness compared with mediolateral bending. Yield load and failure load were significantly greater for the pCCP constructs.

Conclusion The augmented design of the pCCP yielded superior mechanical characteristics during both non-destructive and destructive testings compared with constructs employing standard CCP. The more rigid design of the pCCP suggests that this implant may be better at withstanding greater loads, particularly when applied in a bridging fashion, during the postoperative convalescence. Further investigations are warranted to prospectively evaluate the clinical performance of the pCCP.

Authors' Contributions

Matthew D. Johnson and Daniel D. Lewis were responsible for the study conception and design. Sandra L. MacArthur, Matthew D. Johnson and Daniel D. Lewis were involved in the acquisition, analysis and interpretation of data. All authors were involved in the drafting or revising of the manuscript and all approved of the submitted version.

中文翻译：

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两种锥形耦合板构造物对猫胫骨骨折稳定的生物力学比较。

摘要

目的 本研究旨在比较两种锥形耦合板（CCP）构建体在离体猫胫骨骨折间隙模型中的生物力学特性。

研究设计 从八只最近被安乐死的猫中收获的成对的胫骨被交替分配到两个稳定组之一。用标准的6孔2.5毫米CCP固定一个胫骨，用6孔2.5毫米原型CCP（pCCP）固定对侧胫骨。进行了无损循环四点颅尾弯曲，中外侧弯曲和轴向压缩测试，并记录了刚度。然后将样品加载至轴向压缩破坏，并记录屈服和破坏载荷。

结果 在无损测试中，pCCP结构在弯曲和轴向载荷两种模式下均比CCP结构坚硬。与内侧弯曲相比，这两种构造均显示出较大的颅尾弯曲刚度。pCCP结构的屈服载荷和破坏载荷明显更大。

结论 与采用标准CCP的构造相比，pCCP的增强设计在非破坏性和破坏性测试中均具有出色的机械性能。pCCP的更刚性设计表明，该植入物在术后恢复期可能更好地承受更大的负荷，特别是当以桥接方式应用时。有必要做进一步的研究来前瞻性评估pCCP的临床表现。

作者的贡献

Matthew D. Johnson和Daniel D. Lewis负责研究的概念和设计。Sandra L. MacArthur，Matthew D. Johnson和Daniel D. Lewis参与了数据的获取，分析和解释。所有作者都参与了手稿的起草或修订，并全部批准了所提交的版本。