How much projection can fat grafting to the chin get?

I think a combination approach would be best to achieve the results you want. I find the best option is using fillers like restylane silk or belotero.  Secondarily sculptra, PRP do well to improve symmetry and volumize the face. Please see an expert.  Best, Dr. Emer.

It may be possible to achieve a permanent correction but as to how many procedures it will take is hard to say.  You may be better off with a chin implant since this procedure is quite straightforward.  Best wishes, Dr. T. 

Fat grafting is not an exact science and some fat will not take or what you see initially is often swelling. Best to not over inflate too much and it may require multiple treatments.

The Fat Transfer procedure is a great procedure with great results.  Your results are technique dependent on the physician performing it.  Surgeons each do it to their own technique and results vary. In my practice I have long term results that are permanent and the results speak for themslves. It is a great adjunct and works most places in the body.  In my practice I usually do not have to repeat the procedure and have long term results that age with you. 

Thank you for your question.  Fat transfer to the chin can be helpful, but not as precise and defined as an implant.  The soft diffuse nature of fat transfer limits the amount of augmenation and the precision you can achieve in such a small tight space.  Two transfers area usually enought to achieve a result.  If you are dissatisfied with two transfers, it is unlikely that a third will make you happy.  Try to be more precise with your surgeon regarding what you are trying to achieve.  Next, ask whether an implant or fat is the best way to get there.  Best wishes.