The intermediate component that connects the dental implant (screw in the bone) to the prosthesis (crown, bridge, or denture). It acts like the "stump" of a prepared natural tooth.
The fit of the abutment is critical. If there is a microscopic gap between the abutment and the implant, bacteria can enter and cause bone loss.
The metal or ceramic connector piece that screws into the implant and holds the crown.