Single tooth replacement replaces the lost tooth along with the root and thereby prevents bone resorption. There are other treatment options like tooth supported fixed bridge which requires reduction of the adjacent teeth making them prone to lose its vitality.
This procedure involves placement of implant within the bone over which a metal post named abutment is placed for the crown to be seated. Now the dentist makes the impression to create a model over which the crown is fabricated. Such fabricated crown is attached to the abutment of the implant.