All-on-4 uses four implants; All-on-6 uses six, placed more upright for potentially stronger distribution. Both use a single full-arch bar. 3-on-6 uses six implants but three segmented bridges instead.
Often yes — angled implants avoid grafts in many cases. More significant loss may need grafting, sinus lift, ridge augmentation, or PRF/CGF therapy first.
Implants are permanent; the prosthetic bridge typically lasts 10–20 years. 3-on-6 carries a limited lifetime guarantee; standard All-on-4 does not.
Typically 2–4 hours per arch under IV sedation or general anesthesia, with a same-day temporary bridge.