Could Chin Augmentation Be An Alternative To Jaw Surgery?

Yes, a chin implant is a valid method to correct the appearance of the jaw. It won't change the position of your teeth but can certainly improve the projection of your chin in that area.

The implant can often be placed under local numbing medication in the office (with or without sedation). Surgeons typically use an incision placed either under the chin or in the mouth.

Chin augmentation is an excellent procedure to augment and bring the chin forward.  If the teeth do not fit together properly and are off significantly, jaw surgery should be considered.  For purely cosmetic purposes, adding a silastic chin implant is a much easier procedure done under a local anesthesia in the office surgery center and takes approximately a half an hour.  

It is very clear based on your one profile picture that you have an overall lower jaw deficiency. Your chin is not only short but you have lower lip incompetency as well as seen by the mentalis muscle straining. If you are so motivated to go through lower jaw advancement surgery, this would have the best long-term benefit for you as it provides substantial improvement in your bite as well as in a stronger chin on profile. However, chin augmentation alone can certainly be done if jaw surgery is not appealing to you. It appears that your chin deficiency is greater than 1 cm so consideration needs to be given to a larger chin implant (at least 10 to 12 mms) or even a chin osteotomy. (moving only the chin bone forward) When camouflaging an underlying total jaw deficiency by bringing the chin projection forward, a large amount of augmentation is going to be needed.