Does Invisalign keep record and impressions for express patients? If so, for how long? Would it be possible to order my previous trays for a repeat? If not, how much would Invisalign express cost a 2nd time? A person had Invisalign Express in 2009-2010. LOVED their teeth after the express treatment. Lost their retainers in 2012. Now the teeth have moved back and at a loss for what to do. Wasted $3,000!