Abstract
The research aim was to evaluate the bone regeneration capability of novel load-bearing NiTi alloy (Nitinol) scaffolds in a critical-size defect (CSD) model. High strength "trabecular Nitinol" scaffolds were prepared by PIRAC (Powder Immersion Reaction Assisted Coating) annealing of the highly porous Ni foam in Ti powder at 900°C. This was followed by PIRAC nitriding to mitigate the release of potentially toxic Ni ions. Scaffolds phase composition and microstructure were characterized by X-ray diffraction and scanning electron microscopy (SEM/EDS), and their mechanical properties were tested in compression. New Zealand white rabbits received bone defect in right radius and were divided in four groups randomly. In the control group, nothing was placed in the defect. In other groups, NiTi scaffolds were implanted in the defect: (i) as produced, (ii) loaded with bone marrow aspirate (BMA), and (iii) biomimetically CaP-coated. The animals were sacrificed after 12 weeks. The forelimbs with scaffolds were resected, fixed, sectioned and examined in SEM. New bone formation inside the scaffold was studied by EDS analysis and by the processing of backscattered electron images. Bone ingrowth into the scaffold was observed in all implant groups, mostly next to the ulna. New bone formation was strongly enhanced by BMA loading and biomimeatic CaP coating, the bone penetrating as much as 1-1.5 mm into the scaffold. The results of this preliminary study demonstrate that the newly developed high strength trabecular Nitinol scaffolds can be successfully used for bone regeneration in critical size defects.
| Original language | English |
|---|---|
| Title of host publication | Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures |
| Publisher | American Institute of Physics Inc. |
| Volume | 1683 |
| ISBN (Electronic) | 9780735413306 |
| DOIs | |
| Publication status | Published - 27 Oct 2015 |
| Event | International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2015 - Tomsk, Russian Federation Duration: 21 Sep 2015 → 25 Sep 2015 |
Conference
| Conference | International Conference on Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures 2015 |
|---|---|
| Country | Russian Federation |
| City | Tomsk |
| Period | 21.9.15 → 25.9.15 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
Cite this
Effect of a novel load-bearing trabecular Nitinol scaffold on rabbit radius bone regeneration. / Gotman, Irena; Zaretzky, Asaph; Psakhie, Sergey G.; Gutmanas, Elazar Y.
Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures. Vol. 1683 American Institute of Physics Inc., 2015. 020243.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Effect of a novel load-bearing trabecular Nitinol scaffold on rabbit radius bone regeneration
AU - Gotman, Irena
AU - Zaretzky, Asaph
AU - Psakhie, Sergey G.
AU - Gutmanas, Elazar Y.
PY - 2015/10/27
Y1 - 2015/10/27
N2 - The research aim was to evaluate the bone regeneration capability of novel load-bearing NiTi alloy (Nitinol) scaffolds in a critical-size defect (CSD) model. High strength "trabecular Nitinol" scaffolds were prepared by PIRAC (Powder Immersion Reaction Assisted Coating) annealing of the highly porous Ni foam in Ti powder at 900°C. This was followed by PIRAC nitriding to mitigate the release of potentially toxic Ni ions. Scaffolds phase composition and microstructure were characterized by X-ray diffraction and scanning electron microscopy (SEM/EDS), and their mechanical properties were tested in compression. New Zealand white rabbits received bone defect in right radius and were divided in four groups randomly. In the control group, nothing was placed in the defect. In other groups, NiTi scaffolds were implanted in the defect: (i) as produced, (ii) loaded with bone marrow aspirate (BMA), and (iii) biomimetically CaP-coated. The animals were sacrificed after 12 weeks. The forelimbs with scaffolds were resected, fixed, sectioned and examined in SEM. New bone formation inside the scaffold was studied by EDS analysis and by the processing of backscattered electron images. Bone ingrowth into the scaffold was observed in all implant groups, mostly next to the ulna. New bone formation was strongly enhanced by BMA loading and biomimeatic CaP coating, the bone penetrating as much as 1-1.5 mm into the scaffold. The results of this preliminary study demonstrate that the newly developed high strength trabecular Nitinol scaffolds can be successfully used for bone regeneration in critical size defects.
AB - The research aim was to evaluate the bone regeneration capability of novel load-bearing NiTi alloy (Nitinol) scaffolds in a critical-size defect (CSD) model. High strength "trabecular Nitinol" scaffolds were prepared by PIRAC (Powder Immersion Reaction Assisted Coating) annealing of the highly porous Ni foam in Ti powder at 900°C. This was followed by PIRAC nitriding to mitigate the release of potentially toxic Ni ions. Scaffolds phase composition and microstructure were characterized by X-ray diffraction and scanning electron microscopy (SEM/EDS), and their mechanical properties were tested in compression. New Zealand white rabbits received bone defect in right radius and were divided in four groups randomly. In the control group, nothing was placed in the defect. In other groups, NiTi scaffolds were implanted in the defect: (i) as produced, (ii) loaded with bone marrow aspirate (BMA), and (iii) biomimetically CaP-coated. The animals were sacrificed after 12 weeks. The forelimbs with scaffolds were resected, fixed, sectioned and examined in SEM. New bone formation inside the scaffold was studied by EDS analysis and by the processing of backscattered electron images. Bone ingrowth into the scaffold was observed in all implant groups, mostly next to the ulna. New bone formation was strongly enhanced by BMA loading and biomimeatic CaP coating, the bone penetrating as much as 1-1.5 mm into the scaffold. The results of this preliminary study demonstrate that the newly developed high strength trabecular Nitinol scaffolds can be successfully used for bone regeneration in critical size defects.
UR - http://www.scopus.com/inward/record.url?scp=84984588850&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84984588850&partnerID=8YFLogxK
U2 - 10.1063/1.4932933
DO - 10.1063/1.4932933
M3 - Conference contribution
AN - SCOPUS:84984588850
VL - 1683
BT - Advanced Materials with Hierarchical Structure for New Technologies and Reliable Structures
PB - American Institute of Physics Inc.
ER -