Can Permanent Fillers Be Used for Chin Augmentation?

While they can be used for chin augmentation, permanent fillers may have other undesireable effects. Namely they may not age appropriately with your face. An absorbable filler can be adjusted over time.

Radiesse and hyalunic acids (such as juvederm and restylane) can be used soften the profile of the jawline and increase volume to provide a better proportioned jaw.

Spikeymikey,
I would not recommend any permanent injectable filler into the chin, or anywhere in the face. Your face and skin continue to change over time, and permanent injectable fillers will become visible over time. These fillers cannot be removed.
A better alternative for chin augmentation surgery is an implant, usually made of silicone. The cosmetic results may be permanent, but silicone implants may be removed or exchanged as needed.