AKA “Invisalign type” retainers
This is a clear plastic retainer similar to many types of bleaching trays. They have a typical life expectancy of 6-18 months and the protocol for wear is slightly different here. Generally, these retainers are worn full time (except to eat or brush teeth) for three days, and worn in the pm thereafter. After one year, we advise whatever amount of wear is needed to retain alignment of the teeth and, as above, this will be highly variable from individual to individual.