According to the American Academy of Orthopedic Surgeons (AAOS),
serious complications occur in less than 2 percent of cases.
About 1 percent of people get a postoperative infection. The
same-day-death rate for this same group is extremely rare (0.001
percent). Blood clots are a risk, as they are with most orthopedic
surgeries, but common preventative measures have reduced their
risk. Less than 2 percent of people get them now. Cases of
osteolysis - when plastic or metal fragments are released from the
knee implant into the body and cause inflammation are uncommon.
Also only 0.7 percent of patients experience mechanical
complications during their hospital stay.