Genioplasty after chin implants?

i had a chin reduction 7 years ago and as i got older i wanted my chin back. ive had 2 chin implants that have been unsuccesful. my reason for wanting a genioplasty is to give my chin a 45 degree vertical drop and to reduce the bulk created by my chin implant and to create a masculine v shaped jawline. my doctor says its too risky to reverse a genioplasty and another doctor says its easily reversable. im very frustrated that ive wasted time on 2 chin surgeries and would like to hear opinions.