I perform both depending upon the priorities of the patient. The main difference is that fillers usually cannot obtain the stable result to the degree that an implant can.
Find a plastic surgeon with ELITE credentials who performs hundreds of chin implants and facial procedures each year. Then look at the plastic surgeon's website before and after photo galleries to get a sense of who can deliver the results.
Kenneth Hughes, MD
Los Angeles, CA
Web reference: http://www.hughesplasticsurgery.com/Chin-Implant.php