The All on 4 concept – Replacing ALL your teeth in 15 days!! The All on 4 concepts of replacing all missing teeth in a person’s jaw uses four dental implants (two straight and two angulated) to serve as anchors and provide a strong foundation for the artificial teeth. This is a permanent treatment and teeth can be given immediately after placing the implants without the requirement for waiting for a long healing period. These immediate teeth are usually hybrid acrylic which can be used for up to 2-5 years depending on food habits.