Nickel is probably the most common metal allergy because it is easily recognized. That's why costume jewelry has "nickel free" pierced earring posts. I learned early on my pieced ear holes would swell and turn black, but gold or surgical steel posts were okay sometimes but gold is the best. Blood Test showed I have a moderate nickel and moderate aluminum allergy the other metal allergies are only mild, but with exposure I have learned allergies become more severe. I do not understand why the 5 Day Extended Patch Test on the skin didn't show a reaction to metals. I even had it done twice for metals, yet I had clear reactions on the blood test. The full 5 Day Extended Patch Test testing for about 80 natural and chemical elements, plus the full metal panel is an additional cost. Basic 5 day test, $1,500 plus and Medicare pays for this. Yet Medicare wouldn't pay for the this metal test in the blood which my ortho said was more reliable for metals.
I learned I blister up from liquid bandage as well as other adhesive Band-Aid products. Yet some are okay. I do fine with the adhesive on paper tape. Also blood test showed no allergy to bone cement. This bone cement was not on my 5 day Extended Skin patch test.
If your bone cement is gone, it doesn't really vanish. It is transferred from your cells into your blood stream but I have no idea how long it lasts there before the body eliminates it.
You may not be allergic, but your body seems to attacking the bone cement to break it down and eliminate it.