Title :
The influence of assumed relationships between bone´s mechanical properties and CT density on results of finite element analyses
Author :
Oden, Z.M. ; Hart, R.T. ; Burr, D.B.
Author_Institution :
Dept. of Biomed. Eng., Tulane Univ., New Orleans, LA, USA
Abstract :
This study compares the effect of eight postulated density to modulus relationships on the results of a finite element model of a canine forelimb. In the canine forelimb model, 836 randomly chosen nodes were selected for comparison. The cubic relationship proposed by Carter and Hayes (J. Bone & Joint Surgery, vol.59A, no.7, p.954-62, 1977) was chosen to represent the standard, as it is often used in the automatic generation of material properties in finite element models of bone. Paired t-tests compared each subsequent model to the standard. The student-Newman-Kuels multiple range test for group means was used to determine which, if any, of the results sets were statistically the same. This study showed that the results created using the eight different density to modulus relationships were significantly different from each other in all but one case.
Keywords :
biomechanics; bone; computerised tomography; finite element analysis; physiological models; CT density; automatic material properties generation; bone mechanical properties; canine forelimb; cubic relationship; density to modulus relationships; finite element analyses; paired t-tests; randomly chosen nodes; student-Newman-Kuels multiple range test; Anatomy; Biomedical engineering; Bonding; Bones; Computed tomography; Finite element methods; Material properties; Mechanical factors; Solid modeling; Testing;
Conference_Titel :
Biomedical Engineering Conference, 1993., Proceedings of the Twelfth Southern
Conference_Location :
New Orleans, LA, USA
Print_ISBN :
0-7803-0976-6
DOI :
10.1109/SBEC.1993.247347
