TY - JOUR
T1 - Utility of magneto-electropolished ternary nitinol alloys for blood contacting applications
AU - Pulletikurthi, Chandan
AU - Munroe, Norman
AU - Stewart, Danique
AU - Haider, Waseem
AU - Amruthaluri, Sushma
AU - Rokicki, Ryszard
AU - Dugrot, Manuel
AU - Ramaswamy, Sharan
N1 - Publisher Copyright:
© 2014 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 103B: 1366-1374, 2015. © 2014 Wiley Periodicals, Inc.
PY - 2015/10/1
Y1 - 2015/10/1
N2 - The thrombogenicity of a biomaterial is mainly dependent on its surface characteristics, which dictates its interactions with blood. Surface properties such as composition, roughness wettability, surface free energy, and morphology will affect an implant material's hemocompatibility. Additionally, in the realm of metallic biomaterials, the specific composition of the alloy and its surface treatment are important factors that will affect the surface properties. The utility of magneto-electropolished (MEP) ternary Nitinol alloys, NiTiTa, and NiTiCr as blood contacting materials was investigated. The hemcompatibility of these alloys were compared to mechanically polished (MP) metallic biomaterial counterparts. In vitro thrombogenicity tests revealed significantly less platelet adherence on ternary MEP Nitinol, especially MEP NiTi10Ta as compared to the MP metals (p < 0.05). The enhanced anti-platelet-adhesive property of MEP NiTi10Ta was in part, attributed to the Ta2O5 component of the alloy. Furthermore, the formation of a dense and mixed hydrophobic oxide layer during MEP is believed to have inhibited the adhesion of negatively charged platelets. In conclusion, MEP ternary Nitinol alloys can potentially be utilized for blood-contacting devices where, complications resulting from thrombogenicity can be minimized.
AB - The thrombogenicity of a biomaterial is mainly dependent on its surface characteristics, which dictates its interactions with blood. Surface properties such as composition, roughness wettability, surface free energy, and morphology will affect an implant material's hemocompatibility. Additionally, in the realm of metallic biomaterials, the specific composition of the alloy and its surface treatment are important factors that will affect the surface properties. The utility of magneto-electropolished (MEP) ternary Nitinol alloys, NiTiTa, and NiTiCr as blood contacting materials was investigated. The hemcompatibility of these alloys were compared to mechanically polished (MP) metallic biomaterial counterparts. In vitro thrombogenicity tests revealed significantly less platelet adherence on ternary MEP Nitinol, especially MEP NiTi10Ta as compared to the MP metals (p < 0.05). The enhanced anti-platelet-adhesive property of MEP NiTi10Ta was in part, attributed to the Ta2O5 component of the alloy. Furthermore, the formation of a dense and mixed hydrophobic oxide layer during MEP is believed to have inhibited the adhesion of negatively charged platelets. In conclusion, MEP ternary Nitinol alloys can potentially be utilized for blood-contacting devices where, complications resulting from thrombogenicity can be minimized.
KW - blood-material interaction
KW - blood-material interface
KW - hemocompatibility
KW - metal (alloys)
KW - platelet
UR - http://www.scopus.com/inward/record.url?scp=84941641637&partnerID=8YFLogxK
U2 - 10.1002/jbm.b.33317
DO - 10.1002/jbm.b.33317
M3 - Article
C2 - 25384352
AN - SCOPUS:84941641637
VL - 103
SP - 1366
EP - 1374
JO - Journal of Biomedical Materials Research - Part B Applied Biomaterials
JF - Journal of Biomedical Materials Research - Part B Applied Biomaterials
SN - 1552-4973
IS - 7
ER -