Download or read book A Retrospective Evaluation of the Effectiveness of the Invisalign Appliance Using the PAR and Irregularity Indices [microform] written by Michael Kamatovic and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2004 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: InvisalignRTM (Align Technologies Inc., Santa Clara, CA) has recently (1999) been offered correct malocclusions. Few studies have evaluated the capabilities of this appliance. Forty-four cases were studied for comparison of pre- and post treatment results. These cases were mainly mild to moderate Class I malocclusions. Cases were measured according to the PAR (Peer Assessment Rating) and Little's Irregularity Index. The Invisalign RTM appliance improved the overall PAR score (p