Abstract：
BACKGROUND: Talar neck fractures are rare but potentially devastating injuries, with early reduction and rigid fixation essential to facilitate union and prevent avascular necrosis. Even small degrees of malunion will alter load transmission and subtalar joint kinematics. Changes in fixation techniques have led to dual plating strategies. While locked plating has perceived advantages in porotic bone and comminution, its biomechanical benefits in talar neck fractures have not been shown.
OBJECTIVE: To compare the strength of locking vs. non-locking plate fixation in comminuted talar neck fractures.
METHODS: Seven pairs of cadaveric tali were randomised to locking or non-locking plate fixation. A standardised model of talar neck fracture with medial comminution was created, and fixation performed. The fixed specimens were mounted onto a motorised testing device, and an axial load applied.
RESULTS: Peak load to failure, deformation at failure, work done to achieve failure, and stiffness of the constructs were measured. No statistically significant difference was found between locking and non-locking constructs for all parameters.
CONCLUSIONS: Both constructs provide similar strength to failure in talar neck fracture fixations. Mean peak load to failure did not exceed the theoretical maximum forces generated of 1.1 kN when weight-bearing. We would advocate caution with early mobilisation in both fixations.
OBJECTIVE: To compare the strength of locking vs. non-locking plate fixation in comminuted talar neck fractures.
METHODS: Seven pairs of cadaveric tali were randomised to locking or non-locking plate fixation. A standardised model of talar neck fracture with medial comminution was created, and fixation performed. The fixed specimens were mounted onto a motorised testing device, and an axial load applied.
RESULTS: Peak load to failure, deformation at failure, work done to achieve failure, and stiffness of the constructs were measured. No statistically significant difference was found between locking and non-locking constructs for all parameters.
CONCLUSIONS: Both constructs provide similar strength to failure in talar neck fracture fixations. Mean peak load to failure did not exceed the theoretical maximum forces generated of 1.1 kN when weight-bearing. We would advocate caution with early mobilisation in both fixations.
摘要：
背景：距骨颈骨折是罕见的，但具有潜在的破坏性损伤，早期复位和刚性固定对促进愈合和防止缺血性坏死至关重要。即使是很小程度的畸形也会改变载荷传递和距骨下关节运动学。固定技术的变化导致了双重电镀策略。虽然锁定钢板在骨质疏松和粉碎方面具有明显的优势，其在距骨颈骨折中的生物力学益处尚未显示。
目的：比较锁定与锁定的强度非锁定钢板内固定治疗距骨颈粉碎性骨折.
方法：将7对尸体距骨随机分为锁定或非锁定钢板固定。建立了内侧粉碎距骨颈骨折的标准化模型，并进行了固定。将固定的样品安装到电动测试装置上，和施加的轴向载荷。
结果：故障峰值负荷，破坏时的变形，为失败而做的工作，并测量结构的刚度。对于所有参数,在锁定和非锁定构建体之间没有发现统计学上的显著差异。
结论：两种结构对距骨颈骨折固定失败提供了相似的强度。平均破坏峰值载荷不超过负重时产生的理论最大力1.1kN。我们主张谨慎行事，尽早动员这两种关注。
目的：比较锁定与锁定的强度非锁定钢板内固定治疗距骨颈粉碎性骨折.
方法：将7对尸体距骨随机分为锁定或非锁定钢板固定。建立了内侧粉碎距骨颈骨折的标准化模型，并进行了固定。将固定的样品安装到电动测试装置上，和施加的轴向载荷。
结果：故障峰值负荷，破坏时的变形，为失败而做的工作，并测量结构的刚度。对于所有参数,在锁定和非锁定构建体之间没有发现统计学上的显著差异。
结论：两种结构对距骨颈骨折固定失败提供了相似的强度。平均破坏峰值载荷不超过负重时产生的理论最大力1.1kN。我们主张谨慎行事，尽早动员这两种关注。
