Dental implants are the replacement of tooth roots in the mouth. Implants provide a strong foundation for fixed or removable replacement teeth. Dental implants are small anchors made of biocompatible metal called titanium, which are placed in the jawbone. The anchors begin to fuse with the bone over a few months. After the fusing process, known as osseointegration, abutment posts are inserted into the anchors to allow for the permanent attachment of the replacement teeth. To fabricate the replacement teeth, an impression is taken and a model of the bite is created. The replacement teeth are based on this model. Replacement teeth can either be crowns or dentures.