To keep your aligned teeth in the right positions, you’ll need to wear retainers after the treatment. Retainers prevent your teeth from reverting to undesired positions. Your orthodontist recommends retainers to avoid relapse after Invisalign treatment. Retainers are designed like Invisalign trays to fit on your dental perfectly. Additionally, you’ll wear retainers based on your orthodontic needs; sometimes, you don’t have to wear them. The duration of wearing of retainers gradually lessens with your dental needs, and your schedule may be formulated as follows: for the first six months after completion of your treatment, you can wear the retainers for 12 -22 hours, during the 6th to 12th month, you can wear retainers a night & after one year, 3-5 times during nighttime.