Most hip and knee replacements 'last longer than thought' Eight out of 10 knee replacements and six out of 10 hip replacements last as long as 25 years, says a large study from the University of Bristol.
This is much longer than believed, the researchers said, and the findings will help patients and surgeons decide when to carry out surgery.
To date, there has been little data on the success of new hips and knees.
But this Lancet research looked at 25 years' worth of operations, involving more than 500,000 people. BBC News