A vast majority of total knee replacements can be expected to last ten to fifteen years. A high level of activity and increased weight may decrease the longevity of a total knee replacement. During your hospital stay, pulmonary and urinary complications are the most common problems. This can be a serious problem. Also, infection can occur in this early period after the operation.
Infection can occur at any tune after surgery.
In time, one of the biggest concerns is the eventual wear of the metal and plastic.