When a chameleon has MBD, you can correct it...bring the nutrients back into balance....make the bones and muscles strong again...but the arms and legs, etc will usually remain crooked and some other damage may not be corrected by bringing things back into balance as well. In my experience,from what I've seen, read, etc... normally, the chameleon can live a pretty good, almost normal length life once it's corrected.
To correct it, the chameleon is usually given extra calcium in a liquid form along with the normal schedule of dusting we recommend and proper UVB as well as other proper husbandry? Once the imbalance has been corrected and the bones, muscles, etc are strong again the liquid calcium is stopped and the regular dusting schedule and proper UVB and correct husbandry are continued.