Should Volbella be used on jowls and the jawbone as a filler?

Every dermal filler has its own unique characteristics that make it better for one situation rather than another. Volbella is a very thin and lovely hyaluronic-acid filler that is great for adding subtle volume. I prefer it for the lips, perioral lines,tear troughs, and to fill out tiny wrinkles under the eyes.
If you wanted to make very subtle changes in your jowls and jawline, Volbella might be appropriate. If you want something more dramatic, however, Radiesse, Juvederm, Voluma, and Sculptra are all great possibilities. Consulting with a board-certified dermatologist will bring you the answers you need.

Volbella is the softest filler in Allergan's Vycross family and I wouldn't use it in the jowel or jawbone area unless I was trying to fill fine superficial lines.  Volbella is great for under eyes and filling fine superficial lines.  Your injector will choose the appropriate filler for what you are trying to correct.