Objective To compare the biomechanical performance of internal fixation with medial and lateral locking plates for treatment of distal tibial fractures through finite element analysis.Methods CT scan was performed on the tibia of a healthy male volunteer to construct a normal tibia model.Solidworks 2013 software was used to set up an as-sembly of medial locking plate and locking screws(Model 1),and an assembly of lateral locking plate and locking screws(Model 2).Ansys finite element analysis software(version 14)was used to analyze the bearing capacity and displacement of fracture ends of Model 1 and Model 2 under axial,torsional,and lateral force conditions.Results ①Bearing capacity:after loading axial force,Model 1 was less than 1/6 that of Model 2(P＜0.05);after loading torsion-al force,Model 1 was about 7 times that of Model 2(P＜0.05);after applying lateral force,there was no statistical difference between Model 1 and Model 2(P＞0.05).② Average displacement of fracture end:after applying axial force,Model 1 was smaller than Model 2(P＜0.05);after applying torsional force,Model 1 was greater than Model 2(P＜0.05);after applying lateral force,Model 1 was smaller than Model 2(P＜0.05).Conclusions Compared with the model of lateral locking plate internal fixation,the model of medial locking plate internal fixation on distal tibial fracture has more balance mechanical distribution and better stability.Moreover,the minimal displacement of the frac-ture broken end can effectively stimulate callus regeneration,which is more conducive to fracture healing,with the per-mission of soft tissue,which is more beneficial to the treatment of distal tibial fracture.
distal tibial fracturethree dimensional finite element analysislocking plateaxial compressionfour-point bendingtorsion
万方数据
维普
