Abstract
The present work was aimed at clarifying the stress-shielding effect caused by hip-joint implantation into a femur by using a human cadaver with a cementless hip implant. In particular, bone quality was assessed from the standpoint of preferential c-axis orientation of biological apatite (BAp). Comparing the implanted side to the non-implanted side, a finite element analysis (FEA) indicated that artificial hip-joint implantation had a significant stress-shielding effect on the femur. The results also showed a marked decrease in the degree of preferential BAp orientation as well as bone loss in the medial-proximal femur. This is the first report showing a reduction in the degree of preferential BAp orientation due to a stress-shielding effect after artificial hip-joint implantation. Since preferential BAp orientation is an important index for determining bone mechanical function, these findings should be taken into account in future artificial hip-joint designs, especially those involving the stem component.
Original language | English |
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Pages (from-to) | 565-570 |
Number of pages | 6 |
Journal | Materials Transactions |
Volume | 53 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2012 |
Keywords
- Biological apatite (BAp)
- Biomaterial
- Bone quality
- Finite element analysis (FEA)
- Preferential orientation
- Stress-shielding effect
- Titanium
- Total hip arthroplasty
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering