Zygomatic implants are used for the dental rehabilitation of the upper jaw for patients that suffer from severe bone loss. They are also called zygoma implants. It is mainly conventional implant dentists who use zygomatic dental implants to avoid sinus lift and bone grafting. Basal implant dentists prefer Pterygoid dental implants that are positioned behind the sinuses. But this technique requires additional qualifications and experience. Zygomatic dental implants are anchored into the zygomatic cheekbone. They are often used by conventional implantologists who practise All-on-4 or All-on-6.  All-on-4 Extra is an upgrade on these dental restoration systems. Pterygoid dental implants are used instead of the zygoma implants to resolve the issue of bone loss on the upper jaw.