If your chin still looks significantly recessed after one syringe of filler, that does not necessarily mean the filler was ineffective. The appearance of a recessed chin can be related to the underlying bone structure, the position of the lower lip, and the proportions of the nose, lips, and chin—not simply the amount of filler. For a gummy smile, the situation is a little different. A gummy smile can have several causes, including the way the upper lip moves when you smile, the position of the teeth and gums, or the relationship between the upper jaw and the lips. Chin filler generally will not correct a gummy smile. For your profile, additional chin filler could potentially provide more projection and improve the balance of the lower face, but there is a point where adding more filler can make the chin look overly heavy or unnatural. If the underlying chin is substantially retruded, a more structural solution such as a chin implant or genioplasty may provide a more significant and predictable improvement. The best approach is to look at your face as a whole rather than treating the chin in isolation. A small amount of additional filler may be appropriate in some cases, while a more structural correction may be better if the recession is pronounced.