I haven’t had a knee replacement yet – I’m currently in a similar situation to yours. Here’s my $0.02…
I’m age 63. A few years ago, an MRI on my left knee revealed Grade 3 (Moderate - on the K&L system) OA in the medial compartment, along with “moderately complex” tearing in the meniscus (fortunately, lateral compartment relatively intact). Haven’t had any imaging on the right knee, but consensus among the Ortho docs seems to be that I likely have similar OA on that side, too.
Currently, I have some discomfort with my left knee. And I constantly have to be aware of my body’s tendency to adapt with sub-optimal “guarding” tendencies on that leg, especially when it gets heavier loading. That being said, it doesn’t yet have major impact on my life activities. I still participate in endurance sports (triathlon, road cycling, etc), though I’m a bit more careful with managing my run volume. I also have a strength training program, designed by my physical therapist, that is focused on maintaining balanced gait patterns by building leg muscle strength and mobility.
My goal is to delay the need for a knee transplant as long as possible. My take is that the surgical process, and materials used in the artificial knee, will keep continuing to improve. And that will also be less time that the eventual replacement will need to last. I’m going to ride this train as long as I can, until the OA impacts become a significant enough limiter on my life activities. Then I’ll pull the trigger. Given the pattern of my OA, I will likely need to consider the option between partial and full knee replacement. But no need to choose now.
While I’m hopeful that I can forestall long enough to be able to take advantage of cartilage re-growing therapies some day, I don’t share Mr Chang’s optimism regarding that timeline. From what I’ve seen, there’s been a ton of money thrown for quite a few years at developing therapies to reverse OA, but the projections just seem to continue to be “… we’re a few years away from being able to re-grow…”. At this point, I’m skeptical – though I hope to be proven wrong…
I do know a number of folks who have had hip and/or knee replacements. If I had to choose, I’d take a hip replacement over a knee replacement. Just about everyone I know who has had hip replacement has seen fabulous results – improved mobility and use, along with relatively quick recovery time. The improvement trajectory I’ve seen on knees has been a bit more mixed. Extended recovery times, and more variability in post-replacement capabilities.
My take is that, if you are going to proceed with knee replacement, “pre-hab” is absolutely critical. That is, getting as strong and fit as possible before the surgery. And then, after surgery, being ready mentally for being rigorous in re-hab for a likely extended recovery period. Plan for the worst, hope for the best.
One last comment… Universally, across all the Ortho docs and PTs I’ve worked with, they agree on at least one thing – the best lifestyle action anyone with knee issues can take is to keep their weight down. Every added pound one carries around impacts directly on the loads our knees need to carry. Staying active and fit is super critical…