How it works
Everything begins with a consultation. Your surgeon listens to what is on your mind, examines your face and your bite, and may take an X-ray to see the chin bone and the position of the nerve clearly. From there, your surgeon discusses which direction to move the bone and by how much, and is honest about what the surgery can and cannot do in your case.
The surgery is usually carried out under general anaesthesia, or local anaesthesia combined with sedation. The incision is normally made inside the mouth, in the fold of the lower lip, so it leaves no scar on the skin of your face. Through this opening, your surgeon exposes the chin bone.
Your surgeon uses specialised instruments to cut a segment of the chin bone (this is called an osteotomy), then moves that segment to the position you agreed on: forward, back, up, or shifted to centre it. The bone segment is held in place with small specialised plates and screws so it stays in the right position while it heals. The incision inside the mouth is then closed, usually with dissolvable stitches.
The whole operation usually takes around 1 to 2 hours, depending on how much correction is needed. You may be monitored in hospital for a time afterwards; whether you stay overnight depends on the type of anaesthesia and your condition.