1. 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. Study sponsored by Align Technology and based on adult Class I, nonextraction, mild to moderate crowding cases with SmartTrack material.
2. Compared to Invisalign aligners previously made from single-layer (EX30) material.
3. Some doctors 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.
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