Abdominoplasty procedures are commonly performed to improve the abdominal contour. It is important when contouring the abdomen, to pay attention to the belly button. Not only is belly button position important, but so is the overall shape and how it heals. Healing can be unpredictable with several factors such as genetic make-up, diet, etc. having significant factors..
I prefer to use interrupted half-buried Nylon sutures to place the belly button. I find the Nylon sutures to be the least reactive and when placing them in a half-buried fashion, it tends to prevent the formation of track marks on the skin.