Some patients may think so if the movement given by the implant improves their quality of life enough. But a study from the University of California at Los Angeles advises caution. Researchers collected data from two groups: patients having an ankle fusion and patients getting an ankle joint implant.

They used a computer program to extend the data out by 25 years. The results showed the ankle replacement didn't last more than seven to nine years. More surgery was needed--sometimes to fuse the joint after all.

If you have a joint replacement now, you'll likely have better motion. You can also expect a higher level of function compared with a fusion. Some people are willing to take the chance that new implant designs and improved technology will open up new options in another 10 years.