All-on-4 is a universal dental term which refers to the procedure of placing all teeth on four implants. It is an implant-prosthetic concept in which the entire jaw – upper or lower – rests on four carefully placed dental implants.
The pendulum appliance is a modern fixed functional orthodontic appliance used to move the upper molars (back teeth) backwards, i.e., to distalize them.
A dental bridge is a fixed prosthetic restoration that fills the space created by the loss of one or more teeth. Unlike removable dentures, a dental bridge is permanently cemented and the patient does not remove it during everyday activities.