• Retained roots are also used a way to provide support to overdentures. Overdentures can either be a full or partial denture which is designed to fit over retained teeth or roots. The advantage that overdentures have over complete destures is that the retained roots aid in the preservation of the alveolar bone and also provides an established pattern of mastication and height of bone in the alveolar ridge. However in instances of severe tooth decay the roots will have to be removed