Chin Reduction Surgery: Maxillofacial Surgeon or Cosmeic Surgeon?

Unlike chin augmentation, chin reduction surgery is fraught with a much higher incidence of complications if the correct procedure is not selected or carried out well. Search very carefully for a surgeon who has experience with chin reductions and is aware of the various options for that procedure. Experience is far more important than surgical speciality.

The images you show; are with 'smiling' so that the shape of the chin does change due to the pull of the muscles in the area, which accentuates the chin. A surgeon has to recontour bone tissue based upon the 'passive' position/non-smiling of the chin and jawline. In other words, it may be that the chin is 'only' prominent with smiling.

Also, a Maxillofacial surgeon would be more ideal in your case, since one needs to assess  the lower teeth positions/angles since the teeth influence the lower lip. If the lower front teeth are 'set back' from a normal position, the lower lip falls back and this accentuates the chin prominence.