1Invisalign Go and Invisalign Lite only. With weekly aligner changes compared to two-week aligner changes. Weekly aligner changes are at the discretion of the Invisalign Provider and individual treatment plan. Treatment times vary depending on individual patient needs and must be determined by your Provider. 2SmartTrack material and SmartForce features are clinically proven to improve control of tooth movement with Invisalign clear aligners. Data on file at Align Technology. 3Compared to off-the-shelf, single layer 0.30in material. 4In a study by Miller et al, with adults measuring pain in the first week of treatment.Kevin Miller et al. “A comparison of treatment impacts between Invisalign aligner and fixed appliance therapy during the first week of treatment.” American Journal of Orthodontics and Dentofacial Orthopedics. Volume 131, Issue 3, pp. 302. e1-302.e9, March 2007.