Investigation of nickel suppression and cytocompatibility of surface-treated nickel-titanium shape memory alloys by using plasma immersion ion implantation.
Nickel-titanium (NiTi) shape memory alloys are increasingly being used in orthopedic applications. However, there is a concern that Ni is harmful to the human body. We have recently investigated the use of nitrogen, or oxygen plasma immersion ion implantation to mitigate this deleterious effect. Our results reveal that the near-surface Ni concentration in all the treated samples is significantly suppressed. In addition, our in vitro tests show that the plasma-treated surfaces are cytologically compatible allowing the attachment and proliferation of osteoblasts. Among the two types of samples, the best biological effects are found on the samples with nitrogen implantation.
Yeung
K W K
KW
Department of Orthopaedics and Traumatology, Division of Spine Surgery, Faculty of Medicine, The University of Hong Kong, Pokfulam, Hong Kong.
Poon
R W Y
RW
Liu
X Y
XY
Ho
J P Y
JP
Chung
C Y
CY
Chu
P K
PK
Lu
W W
WW
Chan
D
D
Cheung
K M C
KM
D000818:Animals; D001672:Biocompatible Materials; D049109:Cell Proliferation; D002470:Cell Survival / Q000502:physiology; D017930:Genes, Reporter; D051379:Mice; D009532:Nickel; D010006:Osteoblasts / Q000502:physiology; D013997:Time Factors; D014025:Titanium
D001672:Biocompatible Materials; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium