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Behaviour of nitinol in osteoblast-like ROS-17 cell cultures.
A Kapanen1, J Ilvesaro, A Danilov
1Department of Anatomy and Cell Biology, and Biocenter Oulu, University of Oulu, Finland. anita.kapanen@oulu.fi
Biomaterials
|January 5, 2002
Summary
Nitinol (NiTi) shows good biocompatibility in cell cultures, with low cell death and apoptosis rates. This shape memory alloy is well tolerated by osteoblastic cells, suggesting potential for orthopedic implants.
Area of Science:
- Biomaterials Science
- Orthopedic Research
- Cell Biology
Background:
- Nitinol (Nickel Titanium) is a shape memory alloy used in medical devices.
- Its biocompatibility for long-term orthopedic implants requires further investigation.
- Osteosarcoma cell lines provide a model for assessing material effects on bone cells.
Purpose of the Study:
- To evaluate the biocompatibility of Nitinol (NiTi) in a cell culture model.
- To compare NiTi's effects with stainless steel, pure titanium, and pure nickel.
- To assess NiTi's impact on cell death, apoptosis, and focal contact formation.
Main Methods:
- Rat osteosarcoma cell line (ROS-17) cultured for 48 hours with tested materials.
- Cell death assessed using calcein-ethidium-homodimer labeling.
- Apoptosis detected via TUNEL assay.
- Focal contacts visualized using paxillin antibody staining.
Main Results:
- Nitinol exhibited significantly lower cell death rates compared to nickel (p < 0.01).
- Apoptosis rates varied, with Nitinol showing 1.93 apoptotic cells/1000 cells.
- Nitinol demonstrated a high number of focal contacts (774), significantly more than stainless steel and nickel (p < 0.01).
Conclusions:
- Nitinol is well tolerated by osteoblastic ROS-17 cells.
- The material shows promising biocompatibility for potential orthopedic applications.
- Further long-term in vivo studies are warranted to confirm safety.