A retrospective evaluation of the effectiveness of the Invisalign® appliance using the PAR and irregularity indices.
Published: 2004
Language: eng
Number of pages: 117
Description: 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 &lt; 0.001). PAR scores for maxillary anterior alignment, mandibular anterior alignment, and overjet improved (p &lt; 0.001). Midline correction improved (p &lt; 0.02). Maxillary and mandibular Irregularity Index scores reduced (p &lt; 0.001). Maxillary and mandibular inter-cuspid widths increased (p &lt; 0.001), maxillary ( p &lt; 0.003) and mandibular (p &lt; 0.001) inter-molar widths increased. Overbite and buccal segment relationship (antero-posterior and transverse) PAR scores did not reduce using this appliance. Conclusion: This study provides evidence of InvisalignRTM's potential for orthodontic improvement.
Notes: Adviser: Bryan Tompson.

Thesis (M.Sc.)--University of Toronto, 2004.

Electronic version licensed for access by U. of T. users.

Source: Masters Abstracts International, Volume: 43-03, page: 0813.

MICR copy on microfiche (2 microfiches).