Begg retainer is a dental device designed to facilitate post-orthodontic treatment. It is removable and intended to provide stability for the teeth and gum line, maintaining the recently-established alignment. As such, Beggs retainer is prescribed after the fixed retainer is taken off and has to be worn continuously. It is used as a measure of prevention from unwanted teeth shifting. The dental professional who carries out the treatment will advise the patient for how long they need to wear the retainer at all times before transitioning to nighttime use only.