I would not recommend butt injections of any substance other than your own fat due to risks of infection and tissue loss or deformity.Kenneth Hughes, MDLos Angeles, CA
It is possible to undergo injections in this area either with your own fat or Sculptra after subcision which is releasing any scar tissue that may be preventing expansion of this region.
These injections can cause issues, but I typically only operate or contemplate operating if problems exist. MRI may be helpful for determining location or deposition.Kenneth Hughes, MDLos Angeles, CA