Dental implants are metal anchors put inside the jawbone underneath the gum line . Small posts are attached to the implants and artificial teeth or dentures are fastened to the posts. The length and thickness of the implant depends on the amount of supporting bone available in the jaw. The number of implants placed is determined by the number of teeth to be replaced, the amount of supporting bone available, and the amount of anchorage and nature of the intended fixed or removable prosthesis (crowns, fixed bridges or removable full or partial dentures). The potential benefits of this procedure include the replacement of missing natural teeth or supporting dentures .