An experimental study on the biomechanical properties of the cancellous bones of distal femur.
OBJECTIVE
To study the comprehensive biomechanical properties of the cancellous bone of distal femur through a series of mechanical tests, and provide relevant subjects with the basic technical data.


BACKGROUND
The study on bone mechanics is a commonly used approach to evaluate the biomechanical competency of bone. The biomechanical properties of bone have come to be the precondition of the further research of these relevant clinical subjects.


METHODS
In this paper, comprehensive items of mechanical properties of the cancellous bones of distal femur were conducted, and many valuable test results were obtained through a series of mechanical tests, which comprised tensile test, compression test, torsion test, shear test, bending test and impact test. The specimens were extracted from the normal corpses of Chinese donors died from acute head injury. As another key problem in this kind of experiment, the sampling and fixing method of cancellous bones specimens was developed and optimized in this research.


RESULTS
A series of the experimental data of mechanical properties of cancellous bones were obtained in the tests, these experimental data include tensile strength, compression strength, yield tensile strength, modulus of elasticity, torsion strength, shear strength, torsion modulus, bending strength, yield shear limit and impact toughness, which can reflect the complex mechanical competency of bone, being of great value and practice in clinic and further research on cancellous bones. The mechanical properties of the cancellous bones of distal femur were analyzed and discussed.


CONCLUSIONS
The biomechanical properties of the cancellous bones have a close relationship with individual difference. Comprehensive items of the mechanical properties of the bone can evaluate the mechanical performance of the bone better, and can provide more valuable data to relevant research.
Du
Chunjuan
C
Biomechanics and Medical Information Institute, Beijing University of Technology, Beijing 100022, PR China.
Ma
Hongshun
H
Ruo
Min
M
Zhang
Zhongjun
Z
Yu
Xiaojun
X
Zeng
Yanjun
Y
D000328:Adult; D001696:Biomechanical Phenomena; D002102:Cadaver; D019245:Compressive Strength / Q000502:physiology; D004548:Elasticity; D005260:Female; D005269:Femur / Q000502:physiology*; D006244:Hardness; D006801:Humans; D066298:In Vitro Techniques; D008297:Male; D033081:Shear Strength; D013314:Stress, Mechanical; D013718:Tensile Strength / Q000502:physiology; D016474:Weight-Bearing / Q000502:physiology*