Dental implants are classified into three categories, depending on your specific conditions. A dentist at Ashburton Dental Centre will determine which type will be suited for you. Endosseous implants are screw-shaped metal, ceramic, or ceramic-coated metal implants that are implanted within the jawbone. Transosteal implants are metal pins or u-shaped frames inserted into the mouth through the jawbone and gum tissue. Subperiosteal implants are made out of a metal frame that attaches to the jawbone but is hidden beneath the gum tissue.