背景:本研究的目的是评估钢板钉和双钢板内固定治疗AO/OTA41-C2胫骨平台骨折的生物力学性能。
方法:选择人工胫骨20例,随机分为板钉组(n=10)和双板组(n=10)。两组均在人工胫骨截骨术后模拟AO/OTA41-C2胫骨平台骨折,板钉和双板方法,分别,用于固定,然后轴向压缩加载,三点弯曲,扭转,并进行了轴向破坏试验。记录各组数据并进行统计学分析。
结果:在轴向压缩试验中,板钉组的平均刚度高于双板组(p<0.05)。板钉组产生的位移明显小于双板组(p<0.05)。在抵抗内翻测试中,钢板钉组的应力明显高于双钢板组(p<0.05)。在抵抗外翻测试中,板钉组的应力略高于双板组,但差异无统计学意义(p>0.05)。在静扭转试验中,旋转5°时,板钉组施加的载荷小于双板组(p<0.05)。在轴向压缩破坏试验中,板钉组的平均极限负荷显著高于双板组(p<0.05)。
结论:钢板钉固定治疗AO/OTA41-C2胫骨平台骨折在抗轴向应力和预防胫骨内翻畸形方面优于双钢板固定。而双钢板固定具有更好的抗扭转能力。
BACKGROUND: This
study\'s purpose was to evaluate the biomechanical performance of
plate-nail and dual-plate fixation for the treatment of AO/OTA 41-C2 tibial plateau fractures.
METHODS: Twenty synthetic tibias were selected and randomly divided into a plate-nail group (n = 10) and a dual-
plate group (n = 10). After the artificial tibias were osteotomized to simulate AO/OTA 41-C2 tibial plateau fractures in both groups, the plate-nail and the dual-plate methods, respectively, were used for fixation, and then axial compression loading, three-point bending, torsion, and axial failure tests were carried out. The data of each group were recorded and statistically analyzed.
RESULTS: In the axial compression test, the average stiffness of the plate-nail group was higher than that of the dual-
plate group (p < 0.05). The displacement generated in the
plate-nail group was significantly smaller than that in the dual-
plate group (p < 0.05). In the resisting varus test, the stress of the plate-nail group was significantly higher than that of the dual-
plate group (p < 0.05). In the resisting valgus test, the stress of the plate-nail group was slightly higher than that of the dual-plate group, but the difference was not statistically significant (p > 0.05). In the static torsion test, the load applied to the
plate-nail group was smaller than that of the dual-
plate group when rotated to 5° (p < 0.05). In the axial compression failure test, the average ultimate load of the plate-nail group was significantly higher than that of the dual-
plate group (p < 0.05).
CONCLUSIONS: The treatment of AO/OTA 41-C2 tibial plateau fractures with plate-nail fixation is superior to that with dual-plate fixation in resisting axial stress and preventing tibial varus deformity, while dual-plate fixation has better resisting torsional ability.