Almost 800,000 total knee replacements (TKRs) are done in the U.S. every year, offering many people a chance to reclaim total mobility. But the surgery is complex, the recovery demanding, and it can pose difficulties for people who are severely obese as well as those with certain heart and lung problems.

Fortunately, there are now a couple of possible alternatives that are minimally invasive and offer a quick recovery time.

A procedure called genicular artery embolization can ease pain by blocking a specific network of abnormal blood vessels around the knee joint that develop from osteoarthritis and contribute to inflammation and cartilage damage.

Researchers presented their newest findings on the procedure at the annual meeting of the Radiological Association of North America. Patients' "Knee Injury and Osteoarthritis Outcome Score" improved by 85%.

However, there's not yet data comparing outcomes with TKR five years out.

Most insurers cover this procedure, but double-check with yours first.

Another alternative is autologous chondrocyte implantation, in which doctors take samples of your cartilage cells, grow them in a lab, and then surgically replant them in your knee. This offers renewed padding between the bones.

This procedure is particularly effective in younger patients and athletes, but there's also not yet data comparing five-year outcomes with TKR. Again, check your insurance coverage.

For tips on how to help prevent knee problems, check out the lifestyle upgrade information in "Dr. Oz: 3 Ways to Help Prevent Osteoporosis | The Oprah Winfrey" at YouTube.com.