Magnets have generated a great interest within dentistry and their applications are numerous mainly in retentive aids. The two main areas of use in dentistry are orthodontics and removable prosthodontics. The reason for popularity of magnets is their small size and attractive forces. This allows them to be placed within the prosthesis without being obstructive in the mouth. Mainly rare earth permanent magnets and soft ferro magnetic alloys are used in dental prosthesis. Retention of dentures by magnets is provided by their attraction or repulsion forces. Devices retaining the overdenture magnetically are called magnetic attachments. This article reviewed the alloys and method for magnetic attachments in overdentures.
Keywords: Magnetic attachments, overdenture, magnetic keeper, Alnico, Platinum-Cobalt, Chromium-Cobalt-Iron, Cobalt- Samarium
