Why cheek implants vs. fat grafting or fillers? Or why not?

I had every type of filler put in my face. The volume either disappeared within weeks or left lumps and granules. I then had a face-lift with fat transfer The fat completely disappeared on one side of my face. A little lasted on one side creating bad asymmetry. The surgeon suggested Sculptra. I've had Sculptra at least 15 times, by different doctors over the past 12 years - no improvement in building up the right side of my face or creating symmetry. Are cheek implants a safe option?