Although there is no major reason why you can't do a filler at age 17, studies are typically based on age 18 and older, and the face is still changing. Also, some physicians are uncomfortable treating a "minor", so best to just wait till age 18 for your treatment. Speak with your dermatologist to see if in fact you're a good candidate in the first place.
Thank you for your question. In order to get any medical treatment without parental consent you need to be at least 18 years old. If you feel that you need dermal fillers, I would discuss this with my parents. Then, if they agree, I would have your parent(s) make a consultation with a plastic surgeon and come with you to your appointment.