This varies person to person and depends on the outcome of the treatment. Some patients might need fixed lingual retainer(s). Other patients might need a clear plastic retainer similar to the ones Invisalign makes, such as Vivera Retainers.
If I’ve previously had braces am I still a candidate for Invisalign?
A number of Invisalign patients have undergone a previous treatment involving braces at some point in their past, often during their youth. Invisalign can usually correct the shifting that occurs after braces, and do so without having to go through the trauma and social awkwardness of wearing metal braces.