Dear Habibaketa, Dimples in the buttock are often caused by tight fibrous bands of tissue that tether the skin down to the underlying buttock muscle. Sometimes these dimples are also the result of scarring from injections given in the buttock. Without releasing these tethered tissues, a filler alone such as your own fat or Sculptra often fails since the tight tissues cannot stretch or relax enough for the filler to have impact. A release of the bands through a small incision and then filling the pocket will often successfully address your concerns. Hope this helps.