AUTOMATED 3-DIMENSIONAL FINITE-ELEMENT MODELING OF BONE - A NEW METHOD

被引:290
作者
KEYAK, JH
MEAGHER, JM
SKINNER, HB
MOTE, CD
机构
[1] UNIV CALIF SAN FRANCISCO,DEPT ORTHOPAED SURG,ROOM U-471,SAN FRANCISCO,CA 94143
[2] VET AFFAIRS MED CTR,DEPT REHABIL RES & DEV,SAN FRANCISCO,CA
[3] CALIF POLYTECH STATE UNIV SAN LUIS OBISPO,DEPT MECH ENGN,SAN LUIS OBISPO,CA 93407
[4] UNIV CALIF BERKELEY,DEPT MECH ENGN,BERKELEY,CA 94720
来源
JOURNAL OF BIOMEDICAL ENGINEERING | 1990年 / 12卷 / 05期
关键词
biomechanics; bone; computed tomography; Finite element method;
D O I
10.1016/0141-5425(90)90022-F
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
Three-dimensional finite element stress analysis of bone is a key to understanding bone remodelling, assessing fracture risk, and designing prostheses; however, the cost and complexity of predicting the stress field in bone with accuracy has precluded the routine use of this method. A new, automated method of generating patient-specific three-dimensional finite element models of bone is presented - it uses digital computed tomographic (CT) scan data to derive the geometry of the bone and to estimate its inhomogeneous material properties. Cubic elements of a user-specified size are automatically defined and then individually assigned the CT scan-derived material properties. The method is demonstrated by predicting the stress, strain, and strain energy in a human proximal femur in vivo. Three-dimensional loading conditions corresponding to the stance phase of gait were taken from the literature and applied to the model. Maximum principal compressive stresses of 8-23 MPa were computed for the medial femoral neck. Automated generation of additional finite element models with larger numbers of elements was used to verify convergence in strain energy. © 1990.
引用
收藏
页码:389 / 397
页数:9
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