After 1 1/2 years of pain, swelling getting worse, I was tested for allergies. I will have to have another TKR custom without the bone cement. I am devastated at no one checking for allergies as I have numerous strange food allergies. I am told I may have to wait up to 10 mos for the revision as the FDA only approves a small number of these revisions per surgeons annually. This is because it's not a money maker for the hospitals, so it's limited. Another disappointment as now the hardware is coming loose from the bones and is unstable/more painful. Please pass on my bad experience so others don't suffer. Surgeons should be asking about allergies in this era of more and more people allergic to foods/environmental substances.