If it is hollow below the cheek bone, special implants may help fill this region. Be sure to ask your doctor. Custom implants are available. Small asymmetries may be impossible to correct. If your cheek bones are different sizes in the first place, the implants my look uneven after.
Implants can also rotate and displace small amounts.
Implants may go below the cheek bone to help fill in the hollow area. Until recently, surgery of the cheeks, simply involved increasing the size by implants. The numbers and types of implants were limited in size and design. Several things have changed. For one, the variations and designs of implants have increased the possible configurations tremendously.