All on four is another advanced surgical placement of implants that requires a CT scan for diagnosis and treatment planning. Implants are placed in specific areas of the edentulous arch and at specific angulations to support a fixed restoration. This technique maximizes the existing bone in placing 4 implants to support the restoration. This highly advanced technique requires a skilled surgeon and a skilled restorative dentist like a prosthodontist working together to perform these procedures. A restoration can be placed at the time of surgery or can be delayed depending on the quality and quantity of bone. The advantage of this procedure is the utilization of fewer implants to support a fixed restoration.