When a chameleon has MBD, the nutrients (mainly phos, calcium, D3 and vitamin A) need to be brought back into balance to correct it and then proper husbandry has to follow to stop it from coming back. Most of the crooked bones will remain crooked but the chameleon can still live a good life.
To bring things back into balance, the vet usually recommends a liquid calcium be given until the bones and muscles, etc are back to being strong again. When they are strong again th liquid calcium can be discontinued. The regular supplements should be given on the regular schedule along this extra calcium....and continued after the liquid calcium is discontinued.
The regular recommended schedule is PHOS free calcium dusted lightly on the insects at all feedings but one a week. On that one day, alternate between a PHOS free calcium/D3 powder and a vitamin powder with no D3 but that has a prEformed source of vitamin A...lightly dusted.
It's important to feed/gutload the insects well too.
Make sure the basking temperature is 80F or just slightly above.
Most recommended UVB lights are the long linear Reptisun 5.0 or Arcadia 6% tube lights.
This might help too...
https://www.chameleonforums.com/thr...-like-how-it-happens-and-how-to-fix-it.95071/
I hope this helps to explain it all.