Chin dimpling is thought to be caused by a lack of soft tissue in the middle of the chin. The soft tissue can be muscle (mentalis), fat, etc. What also contributes is the bony structure. When the bone forms two mounds on each side of the midline, a cleft can appear. Chin reduction surgery (chin cosmetic surgery, chin plastic surgery, chin shaping, chin reshaping, chin enhancement surgery) ,is one element of removing the cleft by decreasing the mounds of bone that can be contributing to the cleft. If the soft tissue causes the cleft to persist, the surgeon may need to fill the cleft in with soft tissue brought in from somewhere else. This tissue can come from fat, muscle, etc or even manufactured tissue. Here is a video on chin reduction for you to see.
Thanks for reading, Dr Young
Dr Young specializes in Facial Cosmetic and Reconstructive Surgery and is located in Bellevue near Seattle, Washington