Implants are also solid bases or foundations for complete dentures designed to replace all missing teeth on the patient’s upper or lower jaw. There are several types of fixed and removable dentures. The treatment plan depends on a number of factors, including the patient’s condition (bone structure and mass), state of health and expectations regarding the prosthesis (stability, aesthetics, etc.). The procedure generally requires 2 to 4 implants for the lower dentition and 4 to 6 implants for the upper dentition.