Cheek implants will last longer since they are made of a plastic or rubbery-type of material that doesn't dissolve over time. The main consideration when deciding on whether implants are a good option for you is whether you are OK with the contours of your face looking different than they ever have before. In other words, you will look "different" rather than just "younger". A facelift should take your look back to where you used to be and shouldn't distort or change the original contours. If you didn't like your cheeks in the past (for instance, if they always appeared too flat) then it makes sense to consider cheek implants.However, the skin and other tissues over and around the implants will continue to sag with time, so in that sense, the apparent aging progresses at the same rate whether you get cheek implants or a facelift. You will just look a little tighter and therefore a little younger with implants than if you just had a facelift. Often they are done together.Cheek implants don't so much as "erode" bone, as they "react" to the implant's presence by "remodeling" to accommodate the implant's presence. This probably depends on how much pressure the implant exerts on the bone during normal facial expressions. This is not as much as the pressure of a chin implants, so the bone changes less in response to a cheek implant -- not so much that it will make any significant difference in prominence or effect over time.