Study sponsored by Align Technology and based on adult Class I, nonextraction, mild to moderate crowding cases with SmartTrack material (David W. White, Katie C. Julien, Helder Jacob, Phillip M. Campbell and Peter H. Buschang, Discomfort associated with Invisalign and traditional brackets: A randomized, prospective trial. The Angle Orthodontist Nov 2017, Vol. 87, No. 6 pp. 801-808). Treatment times vary depending on individual patient needs and must be determined by your doctor.
Some Providers still take physical impressions using a soft putty. These impressions are then scanned by Invisalign technicians to create the 3D image for use in the ClinCheck software and manufacturing aligners.