Bob,

I am uncertain which adhesive cement was used to bond the band to your
molars, but it is most likely a Bis-GMA resin (Bisphenol-A
diglycidylether methacrylate).  This resin is the most commonly used
"tooth color" material in dentistry for fillings and it is not
considered toxic.  Methacrylate resins are considered bio-compatible
and are also used for cement in hip replacements.  This is the
material that anti-mercury/amalgam proponents use when replacing the
silver fillings.

The artificial taste should dissipate within the next couple of days
and is only due to some lingering monomer that did not react during
the curing process.

The wires can be made of a few different alloy compositions;
stainless steel, nickel-titanium, titanium-molybdenum or chrome-cobalt
are the most common.

Note:  If you look into the history of super-glue...it was used for
surgical purposed during the Vietnam War.  Also, since you mentioned
the wires appear "hi-tech".  Some nickel-titanium wires can be
thermally programmed to "remember" a specific shape.  You can bend or
crumple the wire into any shape and if the appropriate level of heat
is applied it will return to it's programmed shape.

Best wishes on your treatment.

Sincerely,
Don Schmitt