Answer:
The First 3-6 Months: During this time, retainers should be worn for 22 hours a day or more. The only time they should be removed is to brush and floss or to eat. Your orthodontist will continue to monitor your progress before approving you to wear them at night only.
The First 2 Years: After your initial time of full-time wear, you will be able to start wearing your retainers during sleep only.
From the Third Year to the Rest of Your Life: Now, you can wear your retainers a little bit less. Skipping an occasional night or two is no big deal. A good rule of thumb is to aim to wear them every other night.
Step-by-step explanation:
Hope it helps :-)