This appliance is appropriate in the following circumstances:1) Mild dental crowding2) Mild adult tooth dislocation, who have enough clearance3) Corrective bounce patients4) Fixed orthodontic teethDesign features: First stage (D1): Soft. Mainly used to adapt to the orthotics and initial correction. Second stage (D2): Moderate. Further adapt to orthotics and to enhance remedial effects. Third stage (D3): Hard. Increase the correction force for post correction and maintenance.Usage instructions: Wear the orthotics all night and 1 4 hours during the day. Wear when you study, read, watch TV, use the computer, or work. After using, please wash and store it in the matching box. When you wear it for the first time, the front teeth will feel uncomfortable, this is a normal phenomenon. If there is obvious pain, you can reduce the wear time of the orthotics, and after the sensitivity disappears, you can return to the prescribed time. D1 is soft, the first stage, use 1 3 months. D2 is moderate, the second stage, use 6 8 months. D3 is hard, the third stage, use 5 8 months. The correction process is divided into three stages. After using D1 for 1 month, you can gradually use D2 together. Use D2 on daytime and D1 at night. When you fully adapted to D2, you can be gradually use D3 together. Use D3 on daytime and D2 at night. You must wear it every day, normally, there will be noticeable improvement in 4 6 months.Training methods: You must wear it while you sleep, even if it fall out of your mouth and fall out of it because of your tongue or breathing through your mouth. Once the appliance is kept in the mouth all night, the treatment will be more effective. If you can't wear it at night, please increase the usage time of during the day. Most of time, the mouth should be closed. When the brace is in your mouth, keep your lips closed and use your nose to breathe. Remember to place the tip of the tongue on tongue blocking, even if you not wear it. The improvement of the dentition should be seen within a few weeks after wearing. Remember, the corrective effect is the need for long-term adherence and perseverance.