Due to the size of the indentations and the texture of the skin, excision and filler is recommend. Having both procedures performed would be able to smooth out the indentation and give the best results in terms of aesthetics for the indentation.
A Brazilian Butt Lift (BBL) is also an option to shape and contour the entire buttocks if that is desired as well. Fat from different areas of the body like lateral/medial thighs, abdomen, flank, back, arms, etc, are transplanted into the buttocks via liposuction and fat grafting.
A consultation with a board-ceretified plastic surgeon would be helpful in getting specific recommendations
Arian Mowlavi M.D.