Will Laterals Extruded with Invisalign Intrude at End of Treatment?

Finished my inisalign treatment that involved slight extrusion of my upper lateral incisors. My question is if there is a chance or likelihood of my laterals moving back into my gums (re-intruding?) now that im using a retainer and the attachments that were on those teeth have been removed. I know a retainer will keep my teeth straight, but without something gripping onto those laterals, I fear they may move, especially since the extrusion took place over the last round of refinements. Thanks.