Four common varieties of dental implants are installed. 1) A Single Dental Implant is used to replace one tooth. It is placed directly into the open space in the teeth. 2) An Implant Bridge replaces multiple teeth. The bridge is anchored by implants on either side of the gap and the attached crowns replace the teeth in between. 3) The All-on-4 method is used when all teeth are missing. As the name implies, four implants in the jaw support a full arch of prosthetic teeth. 4) In the final usage, implants serve as attachment points for a standard denture to increase stability and performance.