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首页> 外文期刊>Journal of orthopaedic trauma >Comparison of cannulated screw with tension band wiring versus compressive cannulated locking bolt and nut device (CompresSURE) in patella fractures - A cadaveric biomechanical study
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Comparison of cannulated screw with tension band wiring versus compressive cannulated locking bolt and nut device (CompresSURE) in patella fractures - A cadaveric biomechanical study

机译：tension骨骨折中带张力带导线空心螺钉与加压空心锁紧螺栓和螺母装置（CompresSURE）的比较-尸体生物力学研究

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OBJECTIVE: The purpose of this study was to determine if proximity of cannulated lag screws to the articular surface of the patella combined with the tension band technique affects resistance to fracture gap opening, and if an alternative locking nut and bolt device without a tension band behaves in a biomechanically similar fashion. METHODS: Thirty-three cadaveric knees were allocated to 3 transverse patella fracture fixation groups: cannulated lag screw placement close to the articular (TBA) or non-articular (TBNA) surface with tension, and placement of a compressive locking nut and bolt device without tension band (CompresSURE) close to the articular surface. Knees were cycled through flexion-extension motion for 1000 cycles during which the fracture gap opening was quantified after the first flexion-extension cycle and after the 1000th cycle using an optoelectronic motion analysis system. RESULTS: After the first range of motion cycle, there was no significant difference in fracture gap opening between the 3 groups on the articular surface (P > 0.600). Total fracture gap displacement after the 1000th cycle was not significantly different between groups (P > 0.408). In general and irrespective of fixation technique, fractures opened in a wedge-like fashion with larger measured gap on the ventral surface relative to the articulating surface. CONCLUSIONS: When combined with the tension band, the proximity of cannulated lag screws to the articular surface did not affect resistance to fracture gap opening. Additionally, the stand-alone CompreSURE cannulated locking nut and bolt device without tension band was able to resist fracture gap opening in transverse fractures as effectively as the cannulated screw with tension band technique.
机译：目的：本研究的目的是确定空心方头螺钉与骨关节表面的接近度与张力带技术的结合是否会影响对骨折间隙张开的抵抗力，以及是否有替代的没有张力带的锁紧螺母和螺栓装置是否起作用以生物力学上相似的方式。方法：将33具尸体膝关节分配至3个transverse骨横向骨折固定组：空心拉力螺钉紧靠关节（TBA）或非关节（TBNA）表面放置并施加拉力，以及加压锁紧螺母和螺栓装置紧贴关节表面的张力带（CompresSURE）。通过屈伸运动使膝盖循环1000个周期，在此期间，使用光电运动分析系统在第一个屈伸周期之后和第1000个周期之后对骨折间隙的张开进行定量。结果：在第一个运动周期范围之后，在关节表面上的三个组之间的骨折间隙开放没有显着差异（P> 0.600）。各组在第1000个周期后的总缝隙位移无显着差异（P> 0.408）。通常，与固定技术无关，骨折以楔形方式张开，相对于关节表面在腹侧表面具有较大的测量间隙。结论：当与张力带结合使用时，空心方头螺钉靠近关节表面不会影响对骨折间隙张开的抵抗力。此外，不带张力带的独立式CompreSURE空心锁紧螺母和螺栓装置与采用张力带技术的空心螺钉一样，能够有效抵抗横向裂缝中的缝隙开口。

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