The fixed bridge dental implant treatment are usually built on implants only or combined with natural teeth and implants by providing support needed by the replacement teeth. The crowns are usually built upon the natural teeth and the implants if this is the recommended treatment plan. The crowns are attached to the implants using a screw or implants. Crowns placed on natural teeth are cemented on. The number of implants needed depends on the number of teeth that have to be replaced.