[Objective]To investigate the therapeutic effect of using metacarpal T-shaped steel plate and tension screw to treat posterior tibial plateau fractures through biomechanical analysis.[Methods]Twenty artificially synthesized right tibial models were used to establish a tibial plateau lateral split collapse fracture model based on the morphological characteristics of the fracture.The models were randomly divided into two groups(n=10):Group A was fixed with a 3.5 metacarpal T-shaped steel plate;Group B was fixed with 2 tension screws.Measure the vertical displacement and maximum failure load of two groups under axial load starting at 10 N and maximum pressure of 2000 N.[Results]The vertical displacements of the fracture blocks in the steel plate group and screw group under 250 N load were 0.21±0.15 mm and 0.35±0.11 mm.The vertical displacements of the fracture blocks under 500 N load were 0.32±0.12 mm and 0.91±0.27 mm.The vertical displacements of the fracture blocks under 1000 N load were 0.76±0.16 mm and 1.75±0.21 mm.The vertical displacements of the fracture blocks under 1500 N load were 0.93±0.14 mm and 2.37±0.26 mm.There was a statistically significant difference between the two under the same load(P＜0.05).The maximum failure loads of the steel plate group and screw group were 1865±183 N and 1242±146 N and there was a statistically significant difference in the maximum failure loads between the two groups(P＜0.05).[Conclusion]The use of metacarpal T-shaped steel plate fixation for posterior tibial plateau fractures can effectively,stably,and strongly fix collapsed posterior tibial plateau fractures,demonstrating strong stability and significant biomechanical advantages.
关键词
胫骨平台骨折/胫骨外后侧平台骨折/外后侧骨折/支撑钢板/螺钉
Key words
tibial plateau fracture/fracture of the posterior tibial plateau/external posterior fracture/supporting steel plate/screw
维普
万方数据