Atul Bembi, DO

Botox or other neurotoxins can improve gummy smile.   Your injector May need to increase the dose to improve the results. 

Filler is a great alternate to chin implants both have their pros and cons and may want to discuss this further with a surgeon 

Juvederm family includes many different fillers . Ultra , ultra plus are used for restoring  and volbella for fine wrinkles. I can take 2-3 weeks to see the final results and they will depend  on which filler you had injected. They all will decrease the lines but  none of fillers will completely get rid of the lines. 

40 units of Botox on each side is an appropriate  does. You can also start with 30, but you may need more based on your response 

PDO threads can stimulate collagen and should give you similar results as sculptra. You should give sculptra a bit more time. It can take a few months after the last treatment to see results. A filler will help fill the area but may not resolve the issue completely. You may want to seek consultation with a plastic surgeon to consider other options