Total knee replacement performed 5 years ago. cement had come undo i have to have another tkr. what advice would you give me?

Seek 2nd opinion: At your young age, i recommend seeking a second opinion from a fellowship-trained orthopaedic surgeon who specializes in joint replacement. This is a serious problems with implications for the functionality of your knee.

Have a revision: If the implant is loose, it will need to revised. There are several causes for loosening. See a surgeon who does many revisions and your chances of success will be higher.