What does stable increased flow and uptake of the right knee joint on the triple phase bone scan suggests hyperemia secondary to infection or inflammatory process and bone remodeling or repair and suspect loosening mean. concerning?

I think this report reflects probable ongoing inflammation or loosening of a prosthesis in your knee. I assume you're experiencing significant knee discomfort. Your orthopedic surgeon, who knows your operative history,current symptoms and knee exam findings, is best to advise you. He/she can also confer with the radiologist who interpreted your study.