I have performed many Cheek Augmentations with dermal fillers (I prefer Perlane) and using Cheek Implants for a permanent augmentation for over 25 years. Without non-smiling photos of your face, there's no way to tell if you are a candidate for either. Fillers are a quick office treatment while cheek implants are made out of silastic and require surgery for placement. I have to be honest and tell you that it's a bit unusual for an 18 year old to require cheek implants as the face still retains a significant amount of baby fat around the cheeks. You can always e-mail us photos for further evaluation. Hope this helps.