Abstract Objective:To treat humerus fracture with three dimensional pattern andfinite element analysis,providing mechanical basis for treating humerus fracture.Methods:Humerus pattern was established based on the CT images,and calculation was done by ANSYS5.6 software.Three dimensional ten-node tetrahe-dron unit was selected and were divided into 2729 nodes,49041 units.Distribution and amount of axial com-pression of humerus were analyzed when clip angle was 30°,45°,90°between facture face and axial line with fixed X,Y,Z directions.Results:The distribution of stress was greatly different between fracture face and non fracture face.Stress in fracture part was fairly concentrated with incomplete symmetric distribution around the center of fracture face;Greater stress distributed in the regions 10 mm from fracture face, which was 2-3 times that of other stress regions.Conclusion:Required load must be estimated under various condi-tions as to select the suitable internal fixation implants during the treatment of humerus fracture,which can provide helpful stress environment for fracture healing.
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