An implant-supported prosthesis is an implant on top of a milled bar, implants that support a hybrid, or eight to 10 implants using fixed bridgework. A hybrid prosthesis consists of a custom-milled titanium or zirconia bar, milled from an implant level impression or from a multi-base abutment impression. It can be fixed, or in the case of the bar-retained overdenture, attached and unmovable. Often, they don’t require a flange because the support comes from the implants. More implants provide greater stability, and when they’re fixed, as in a hybrid, or cemented, they perform like natural teeth. Hybrids and fixed prostheses can be less intrusive due to the elimination of the bar or framework.