Medical implants are devices used to replace a missing biological structure support a damaged biological structure or enhance an existing biological structure. They can be either placed permanently or removed once they are no longer needed. For example hip implants are permanent while chemotherapy ports can be removed when they no longer needed. While medical implants help extend and improve quality of life they can carry some risks. These include surgical risks during placement or removal infection implant failure or reactions to the materials used in implants. Now let’s have a look at some of the most implanted medical devices.