Ive had both of my knees replaced. My right knee in 2012, by one doctor and my left knee in 2013, by a different doctor, but both doctor are from the same hospital. On May 2 ,2019.. I am having my left knee done again because it is lose. I am not as active as I should be , but I work everyday and come home and take care of my family. I do not understand how my right knee was done first, but ,y left knee has to be done again , unless my left knee was done improperly. Please Help