Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Box plot graph for concentration of Ni ions (a) in artificial saliva with (Ni) and without (Ni0) orthodontic appliance and for Cr (Cr, Cr0) (b). c Scatter plot showing the correlation between Ni and Cr ions in artificial saliva incubated with orthodontic appliance
