Lip augmentation could be performed using different fillers. Natural fillers include fat,dermis etc. Other filler include Restylane, Juvederm, etc..
The degree of correction depends on the amount injected. You need to accurately translate your expectations to your plastic surgeon and i'm sure he will be able to acheive the level of augmentation desired. Just remmeber that it is easier to add more volume than to end by a huge un-natural looking lip.
Best of luck!


