The implant technology developed as the all-on-four concept is offered as an alternative to conventional implant applications. In the all-on-four technique, 4 implants are placed in the inter foraminal region in the mandible and in the pre-maxillary region in total edentulism cases. An exception is the all-on- Four concepts, which uses only 4 implants to support an acrylic, screw-retained provisional prosthesis delivered on the day of implant placement,...