Biomechanical analysis of different fixation methods for treating posterior tibial plateau fractures
[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.
tibial plateau fracturefracture of the posterior tibial plateauexternal posterior fracturesupporting steel platescrew
万方数据
维普
