Would Dermal Fillers Remove Deep Forehead Lines Unaffected by Botox?

Not all wrinkles can be completely removed. However combination treatments usually works best for deep lines. Botox is quite helpful to relax the muscles and decrease the lines. Fillers like Juvaderm or even fat work work to "fill in the valleys". If lines are especially deep, fat works the best, and is much longer lasting. Chemical peels and laser resurfacing can also be very helpful to treat the surface of the skin, help tone, stimulate new collagen, and treat lines as well. If you plan to invest in your skin, stay out of the sun and tanning beds, use protective sun screens, avoid tobacco, drink lots of water, and eat plenty of fruits and vegatables to minimize damage and give your skin what it needs to be healthy.

Typically dermal fillers are not used on the forehead. Lasers can be a good adjunct to Botox in the forehead. In rare cases you can use fat injections

I like to use Botox in conjunction with dermal fillers, as the lines are caused by constant movement, so no matter what treatment you do, nothing will ever get rid of them if the muscles keep moving and bringing the lines back.  Once the lines are relaxed I will do a combination of dermal fillers and lasers to soften their appearance.  Studies have shown that combining filler with Botox is superior to improving lines created by movement and present at rest than either one alone.