A crown refers to a tooth-colored cap that corrects an uneven or chipped tooth. This can be cosmetic or restorative and is fitted to a tooth with an existing root structure.    A dental implant crown is restorative and serves as a replacement for an entire tooth. Dental implant crowns are artificial teeth that are attached to an abutment, which protrudes out of the gum. The abutment itself is attached to a dental implant, which is a small titanium screw implanted into the jaw bone and which acts as a tooth root.