In every patient undergoing a chin implant procedure the presence of excess fat under the chin needs to be considered. If the submental region is full it can make a chin look short. These issues will often coexist, and therefore the nicest improvement of that part of the body can be attained when both problems are fixed together.
Doing submental liposuction along with a chin augmentation adds little discomfort or time to the recovery. And most importantly, they can be done together. Both the patient and plastic surgeon should assess both structures in patients inquiring about one or the other.