Facial Liposuction or Corrective Jaw Surgery? (photo)

I hate my sagging neck which has developed over the past few years (I am 36). An orthodontist suggested braces & corrective jaw surgery to bring my lower jaw forward. Although I would love to have perfect teeth, as mine are very crowded, I am really concerned that the surgery will make my chin more masculine, pointy & prominent. Also my overbite isn't very pronounced so not sure I need it. My other option could be facial liposuction under the chin. Any suggestions would be gratefully received.

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