I would say it is hard to answer with out seeing your bite, if you have a good bite and dental relationship genioplasty is the best, if your dental relationship is off then jaw surgery would help. I would not recommend chin implant at your age.
Ali Totonchi M.D.
Significant chin retrusion
Your entire lower jaw is very weak and consideration could be made for a jaw advancement procedure. A compromise approach would be for a genioplasty and/or chin implant. The advantage for genioplasty would be that it actually will modestly tighten the muscles below your chin and potentially help your neckline. The advantage for chin implant is its simplicity. Doing a chin implant after modestly advancing the chin via genioplasty can also be an option. Please seek consultation with an experienced surgeon.
A weak chin profile is best addressed with a chin implant. Chin implants are manufactured in a variety of sizes and shapes, are composed of Silastic, are inserted under local anesthesia as an outpatient surgical procedure.
That is a significantly weak chin. I would lean more towards genioplasty. Moreover I would evaluate your overall facial skeletal relationship for possible need for corrective jaw surgery. Correcting your skeletal deficiency will improve aesthetics as well as prevent potential for future obstructive sleep apnea. Best of luck
Chin implant or genioplasty?
You have significant recession and are more of a sliding genioplasty candidate. Sometimes I do the genioplasty and also place an implant. You may need both.
Joe Niamtu, III DMD
Cosmetic Facial Surgery
I think you are a candidate for jaw surgery instead. Your jaw is too small. You might want to redo the braces and then advance the lower jaw by surgery.