Key features:American Dental Dessa developed this orthodontic appliance features are combined with the human study， a multi-function appliance into one， simple， practical， effective treatment of a new type of orthodontic equipment.Applicable to young children in upper and lower teeth are crowded， open jaw， jaw deep overbite， maxillary protrusion， the usual broad lips， providing item with early treatment program， And to improve facial shape guide to promote the normal development of jaw.Instructions:1 General require user wear the orthodontic braces for 1-2 hours during the day， and 8 hours at night.2 At first week， your teeth may feel pain and soreness， this is normal. You need keep on using everyday.3 These orthodontic braces with good quality， but do not bite them， avoid deformation.4 Before and after use them， please clean with a toothbrush use cold or warm water，do not use hot water! Then put them in clean box.Stage 1 is softer ，use this blue one，give the mouth a time to accomodate.Stage 2 is harder， use this white one， ater the accommodation with the blue one.Functions:The idea dental arch track， moderate forces.After burning bow lips， tongue to avoid acting on the teeth jaw between the mistake caused by the tongue induced device， limiting tongue protrusion and tongue profile， neutral spaces jaw position device. Materials must be used with flexibility (there is a good memory function)， similar to nickel-titanium wire and the role of role of arch wires， Orthodontics can be used as a late addition to maintain Used (remove the brackets for later use).Package including:1set Trainer Alignment Braces Mouthpieces including 1*hard+1*soft.Note:Straighten the teeth not a short time thing， you need keep on using them. Do not suspect their effect， they need time to proof themself! Do not leave bad comments when you only use them several days.Effect will show after 6 monthes. We are honest seller!