Relations between the Microscopic Structure and Fractures of Human Compact Bone

1979 ◽  
pp. 211-245 ◽  
Author(s):  
F. Gaynor Evans
Keyword(s):  
Compact Bone ◽  
Microscopic Structure ◽  
Human Compact Bone

scholarly journals Mechanical Properties and Bioactivity of Poly(Lactic Acid) Composites Containing Poly(Glycolic Acid) Fiber and Hydroxyapatite Particles

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 249
Author(s):  
Han-Seung Ko ◽  
Sangwoon Lee ◽  
Doyoung Lee ◽  
Jae Young Jho
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Flexural Strength ◽  
Interfacial Adhesion ◽  
Glycolic Acid ◽  
Compact Bone ◽  
Poly Lactic Acid ◽  
Coupling Reactions ◽  
The Poor ◽  
Human Compact Bone

To enhance the mechanical strength and bioactivity of poly(lactic acid) (PLA) to the level that can be used as a material for spinal implants, poly(glycolic acid) (PGA) fibers and hydroxyapatite (HA) were introduced as fillers to PLA composites. To improve the poor interface between HA and PLA, HA was grafted by PLA to form HA-g-PLA through coupling reactions, and mixed with PLA. The size of the HA particles in the PLA matrix was observed to be reduced from several micrometers to sub-micrometer by grafting PLA onto HA. The tensile and flexural strength of PLA/HA-g-PLA composites were increased compared with those of PLA/HA, apparently due to the better dispersion of HA and stronger interfacial adhesion between the HA and PLA matrix. We also examined the effects of the length and frequency of grafted PLA chains on the tensile strength of the composites. By the addition of unidirectionally aligned PGA fibers, the flexural strength of the composites was greatly improved to a level comparable with human compact bone. In the bioactivity tests, the growth of apatite on the surface was fastest and most uniform in the PLA/PGA fiber/HA-g-PLA composite.

Characterization of Porosity and Pore Size Distribution Changes in Human Compact Bone by Low-Field NMR

2000 ◽  
Author(s):  
Qingwen Ni ◽  
J. Derwin King ◽  
Xiaodu Wang
Keyword(s):  
Mechanical Strength ◽  
Compact Bone ◽  
Biomechanical Properties ◽  
Spongy Bone ◽  
Comprehensive Review ◽  
Low Field ◽  
Human Compact Bone ◽  
Direct Sensing ◽  
Low Field Nmr

Abstract Previous studies have shown that the overall porosity of bone has a significant effect on the mechanical strength of bone. In a comprehensive review on porosity of bone, Martin [1] described that small changes in porosity would lead to significant changes in the stiffness and strength of both compact and spongy bone. In a recently study, McCalden [2], reported that the porosity of bone has a significant effect to absorb energy during fracture. Since changes in numbers and sizes of these natural cavities are directly related to the remodeling processes and biomechanical properties of bone, a direct sensing technique to detect such changes in bone has been long wanted.

Nonlinear creep of human compact bone tissue upon stretching

1978 ◽  
Vol 14 (1) ◽  
pp. 82-84 ◽  
Author(s):  
A. �. Melnis ◽  
Ya. B. Laizan
Keyword(s):  
Bone Tissue ◽  
Compact Bone ◽  
Nonlinear Creep ◽  
Compact Bone Tissue ◽  
Human Compact Bone

An evaluation of some factors affecting the creep properties of human compact bone tissue

1982 ◽  
Vol 17 (6) ◽  
pp. 711-715 ◽  
Author(s):  
A. �. Melnis ◽  
A. F. Kregers ◽  
K. K. Villerush
Keyword(s):  
Bone Tissue ◽  
Compact Bone ◽  
Creep Properties ◽  
Factors Affecting ◽  
Compact Bone Tissue ◽  
Human Compact Bone

Aging and matrix microdamage accumulation in human compact bone

Bone ◽  
1995 ◽  
Vol 17 (6) ◽  
pp. 521-525 ◽  
Author(s):  
M.B. Schaffler ◽  
K. Choi ◽  
C. Milgrom
Keyword(s):  
Compact Bone ◽  
Microdamage Accumulation ◽  
Human Compact Bone
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