Will genioplasty be enough or do I need jaw surgery? (photos)

Jaw surgery depends on many factors. It is not really done for aesthetic reasons, but to improve mechanical issues, as well as general quality of life. Overbites can generally be fixed with orthodontics and elastics, and in your case, would want to bring the lower jaw forward. In the end you want your teeth to align and to have a good bite. For arguments sake, lets say your bite is ok and you don't suffer from things like sleep apnea, a genioplasty would achieve your desired look. Submental lipo could be considered, but the genioplasty may give the results you want. That would be done second to the chin advancement.

Genioplasty is strictly a cosmetic procedure that can be performed in the office and does not change your bite or require braces. Jaw surgery is usually performed in the hospital and the goal is to improve function and align the jaws. If you are able to eat and chew normally then you don't require jaw surgery. A genioplasty will not change your overbite. If your only concern is cosmetics, then a genioplasty will likely give you the results that you are looking for. The genioplasty procedure is versatile and allows the chin to be advanced and lengthened simultaneously.

Your imaging (or perhaps the descriptions) are a bit confusing. But the difference in effect of the labiomental fold shape is seen in the last two images. In a sliding genioplasty the depth of the labiomental fold will become deeper. In total lower jaw advancement surgery the depth of the labiomental fold either stays the same or is lessened (depending on how much forward jaw movement is done) because the teeth are brought forward as well. (which pushes out the fold) In pursing a sliding genioplasty in cases just like yours, the labiomental fold deepening issues can be partially overcome by a combination of bone chip grafting of the bony stepoff created by the sliding genioplasty as well as injection fat grafting to the subcutaneous fold area.