在髂骨骨折模型中使用悬臂弯曲对传统加压钢板和锁定加压钢板进行比较。

A comparison of conventional compression plates and locking compression plates using cantilever bending in an ilial fracture model.

作者信息

Bruce C W, Gibson T W G, Runciman R J

机构信息

Dr. Charles W. Bruce, Department of Specialty Surgery, Alta Vista Animal Hospital, Ottawa, Ontario, K1T1M9, Canada, Phone: +1 613 731 6851, Fax: +1 613 731 2315, E-mail:

出版信息

Vet Comp Orthop Traumatol. 2014;27(6):430-5. doi: 10.3415/VCOT-14-01-0001. Epub 2014 Oct 27.

DOI:10.3415/VCOT-14-01-0001

PMID:25345445

Abstract

OBJECTIVES

The purpose of this study was to compare the stiffness, yield load, ultimate load at failure, displacement at failure, and mode of failure in cantilever bending of locking compression plates (LCP) and dynamic compression plates (DCP) in an acute failure ilial fracture model. Our hypothesis was that the LCP would be superior to the DCP for all of these biomechanical properties.

METHODS

Ten pelves were harvested from healthy dogs euthanatized for reasons unrelated to this study and divided into two groups. A transverse osteotomy was performed and stabilized with either a 6-hole DCP applied in compression or a 6-hole LCP. Pelves were tested in cantilever bending at 20 mm/min to failure and construct stiffness, yield load, ultimate load at failure, displacement at failure, and mode of failure were compared.

RESULTS

The mean stiffness of DCP constructs (193 N/mm [95% CI 121 - 264]) and of LCP constructs (224 N/mm [95% CI 152 - 295]) was not significantly different. Mean yield load of DCP constructs (900 N [95% CI 649 -1151]) and of LCP constructs (984 N [95% CI 733 -1235]) was not significantly different. No significant differences were found between the DCP and LCP constructs with respect to mode of failure, displacement at failure, or ultimate load at failure.

CLINICAL SIGNIFICANCE

Our study did not demonstrate any differences between DCP and LCP construct performance in acute failure testing in vitro.

摘要

目的

本研究旨在比较锁定加压钢板（LCP）和动力加压钢板（DCP）在急性骨折的犬髂骨骨折模型悬臂弯曲试验中的刚度、屈服载荷、破坏时的极限载荷、破坏时的位移及破坏模式。我们的假设是，在所有这些生物力学性能方面，LCP将优于DCP。

方法

从因与本研究无关的原因实施安乐死的健康犬身上获取10个骨盆，并分为两组。进行横向截骨术，并用加压应用的6孔DCP或6孔LCP进行固定。以20mm/min的速度对骨盆进行悬臂弯曲试验直至破坏，并比较结构刚度、屈服载荷、破坏时的极限载荷、破坏时的位移及破坏模式。

结果

DCP结构（193N/mm [95%CI 121 - 264]）和LCP结构（224N/mm [95%CI 152 - 295]）的平均刚度无显著差异。DCP结构（900N [95%CI 649 - 1151]）和LCP结构（984N [95%CI 733 - 1235]）的平均屈服载荷无显著差异。在破坏模式、破坏时的位移或破坏时的极限载荷方面，DCP和LCP结构之间未发现显著差异。