Locator® Implant Overdentures are fabricated using freestanding Locator Attachments, which are utilized to provide retention and stability in this primarily tissue-borne restoration. Locator Implant Overdenture is indicated when there is an adequate ridge and the prosthesis will be primarily tissue-borne with the implants providing retention and there are at least four implants in place. Locator implant overdentures are most common in the mandible.