Recently the most basic restoration for the edentulous mandible should be an implant retained overdenture with two implants placed in the anterior mandible. In completely edentulous patients, implants can be used in conjunction with attachments to enhance the retention and stability of the overdentures. Different types of attachment systems had been suggested for retaining implant supported overdentures including stud (ball and socket, locator), bar, telescopic and magnetic attachments. All these types of anchorage systems had different retentive capacities.