Abstract:Objective To compare the biomechanical data of the complete group and reconstruction group in the anterior medial collateral ligaments of the brachial joint and the effect of reconstruct MCL with artificial tendon fixed by interfacial screw.Methods We used the human elbow joint specimen and put the pressure sensitive film into the space of humeroradial joint,then measured the valgus laxity of elbow,the pressure and the contact area of humeroradial joint in the different state and the anterior funicle of MCL and in the different flex angle.According to the different state of the anterior funicle of MCL the specimens were divided into 2 groups:the anterior funicle complete group and the anterior funicle reconstruction group ).There were 20 cases in every group.Results There was no significant difference in the valgus laxity within group and between groups in different flexion degrees(P>0.05).No significant difference was found in the intraarticular pressure in elbow flexion of 30,60,and 90° within group and between groups(P>0.05) except in elbow flexion of 0°(P<0.05).The stress area of the humeroulnar joint in 0° flexion was significantly larger than that in 30,60,and 90° flexion in the control group(P<0.05),but no significant difference was found within group and between groups in the other flexion degrees(P>0.05).Conclusion The anterior bundle of MCL has important significance for maintaining the valgus stability of the elbow.Reconstructing the anterior bundle by using artificial tendon and interference screw can instantly restore elbow inside of the structure stability,reduce the pressure in the humeroradial joint,increase the humeroradial joint contact area,reducing the incidence of humeroradial joint chronic injury.