Ode, do you mean one silver wire on the outside of the teeth, between the
teeth and cheek (below the tooth line) and the aluminum foil on the other
side of the mouth--same position--or the other side of the same row of
teeth--between the teeth and the tongue?  One will pull the silver across
the whole mouth (in theory) and the other would just be pulling across one
row of teeth. 
 
Samala,
Renee
 
-------Original Message-------
 
  Lay a length of silver wire along the gum line down low so as not to
actually contact the teeth, and roll up some Aluminum foil into a "wire"
and lay it likewise along the gum line on the other side.