Most people understand that part of a dental implant screws into the bone. That is one of three main parts called the body of the implant. It is the most expensive part and is surgically placed. The body of the implant is threaded on the outside to adhere to the bone and it also threaded on the inside so that other parts can be attached to the body once it is stable. The part that screws directly into the implant is called an abutment. Abutments can be made custom out of titanium, zirconia or a combination of the two. Prefabricated abutments can sometimes be used for certain situations. The final part is what most people want in the end and that is a crown (or the part that makes it look and act like a tooth). Implant crowns can be cemented to the abutment or they can be screw retained along with the abutment.