Three-Dimensional Reconstruction and Finite Element Analysis of
Normal and Osteoporosis Humerus
GUO Wenwen1, LIU Jing1, CAO Hui1, ZHOU Huilin2, LV Songtao2, TANG Weichang2
1.College of Science and Technology, Shandong University of Traditional Chinese Medicine, Jinan Shandong 250355, China;
2.Shanghai Daosh Medical Technology Co., Ltd., Shanghai 201203, China
Abstract：Objective To establish a three-dimensional finite element model of normal and osteoporosis humerus and analyze the
stress distribution. Methods A volunteer who was excluded from the lesion was selected to perform a CT scan on the right humerus.
Three-dimensional reconstruction, grid partitioning and material assignment according to the grey value into compact bone and
cancellous bone parts was conducted on the scanogram by MIMICS software. Then, the reconstructed scanogram was imported into
the ANSYS software, and the restrictions were performed on the proximal humeral. Sixty percent of the loading was applied on the
distal and forty percent was performed on the humeral capitellum pulley, the stress distribution condition of the humerus was then
analyzed. A model of osteoporosis was constructed on the volunteer for the finite element model of the elastic modulus of in compact
bone parts decreased by 33%, cancellous bone fell 66%, and poisson’s ratio was in constant. The same constraints and loads as the
health model was applied, the stress as a result was observed and the comparison was performed between them. Results Both of
the stress of the health model and the osteoporosis model were almost focused on the backbone of the upper, the stress humerus of
distal and proximal humerus was small, the overall stress trend was similar. As extracting the nodes on the upper part of the condyle,
we found that both of the models measured by the ulnar stress was greater than the radial stress. Normal model was greater than
the osteoporosis model when the mean value of stress was randomly selected from the humerus head and below the crest of the
greater tuberosity node, presumably due to osteoporotic bone bone mineral density, bone trabeculae and bone strength decreased.
Conclusion The overall force trend of the osteoporosis humerus is similar to that of the normal humerus, which is characterized by
large force on the backbone area and small force on both ends of the bone. The normal humerus has a higher load intensity.
郭文文1，刘静1，曹慧1，周会林2，吕松涛2，汤伟昌2. 正常与骨质疏松肱骨的三维重建及有限元分析[J]. 中国医疗设备, 2018, 33(4): 34-37.
GUO Wenwen1, LIU Jing1, CAO Hui1, ZHOU Huilin2, LV Songtao2, TANG Weichang2. Three-Dimensional Reconstruction and Finite Element Analysis of
Normal and Osteoporosis Humerus. China Medical Devices, 2018, 33(4): 34-37.
