I have an overbite (and possibly overjet). Chin implant or Genioplasty? (photo)

Significant chin reduction regardless of the way it is done, may result in chin soft tissue ptosis. However, only on the basis of in person evaluation, an experienced, board certified plastic surgeon familiar with this procedure, will be able to answer your questions in more detail. Good luck.

You are a good candidate for a genioplasty. Your chin is a bit short and recessed. Moving it forward and down would bring balance to your profile while elongating your jawline. It would create a more "v" shape facial structure. It would also help improve chin ptosis as well. However it might not...

I have not seen an infection following a genioplasty. Occasionally, a screw can work its' way out and need to be removed. I have never removed an infected plate. Typically, oral infections are treated with antibiotics.