I had 4 metal allergies & bone cement but nickel was highly reactive, I had Conformis TKR in 2019 and I was told I was better off living with it than to do revision. I had TKR in left knee 2 weeks ago (OCT 12 2022) and Dr used Smith-Nephew (oxidized zirconium) but had to use bone cement. I could have used cement-less, but my first TKR is ok, just stiff all the time. I'd rather deal with bone cement than 4 metal allergies. You are mildly reactive, you might want to live with it, alot of revisions get infections. Just my opinion! Good luck!!!