Pre-maxillary development alone is not always sufficient to correct a Division 2 malocclusion. Sometimes the anteriors need to be tipped labially to gain additional arch length. Recurved springs lingual to the centrals provide a controlled labial force, tipping the centrals and increasing arch length. Placing small composite buttons or ledges on the lingual aspect of these teeth is often helpful in maximizing spring effectiveness. Note: Many clinicians like to add occlusal coverage to these appliances to aid in the retention. Occlusal coverage can also be indexed heavily to take advantage of inter-arch anchorage.