Treatment Effectiveness of the Invisalign® System: A Systematic Review
|Godel, Jeffrey H.
|Kim, Aileen Sehee
|The aim of the investigation was to search the current literature (from April 2005 to December 2012) and determine the effectiveness of orthodontic tooth movement using the Invisalign system. With changes in attachments implemented within the past few years, a more recent appraisal of the available literature is of value. It is expected that this systematic review will provide a more up-to-date understanding of the treatment effects (efficacy in tooth movement and stability) of the Invisalign system. Additionally, an evaluation of the indications and case selection using Invisalign will be conducted A computerized search was conducted using PubMed, Evidence Based Medicine (EBM) Reviews Database (Cochrane Database of Systematic Reviews), Database of Abstracts of Reviews of Effects and Cochrane Central Register of Controlled Trials, Science Direct, and Thomsen's ISI Web of Science. Inclusion criteria that were to be satisfied by the literature search results were publications in English and human clinical trials. Studies not pertaining to the question of clinical effectiveness of Invisalign were selected for exclusion. Case reports, book chapters, and review papers were considered separately for analysis and contribution to the general information gathering in the systematic review. Book chapters were excluded. Quality assessment was performed on the studies that fulfilled the inclusion criteria. The quality and design of the study was considered. Of the studies that passed the quality assessment stage, a thorough evaluation was completed. Summaries of the included articles were prepared and information regarding study design, subjects, treatment times, and outcomes were organized in tabulated form. Appraisal of the included studies was performed using the 2010 CONSORT statement and 2009 ADA Clinical Recommendations Handbook. Overall, of the 271 studies reviewed (Stage I), 23 were selected for further review (Stage II). Ultimately, 10 studies were included in the systematic review (Stage III). In summary, after thorough analysis of the studies, it has been shown that Invisalign is an effective appliance for minor space closure, lingual constriction, and correction of anterior rotations and marginal ridge height discrepancies. However, Invisalign lacks the ability to correct anteroposterior discrepancies, occlusal contacts, extrusion, and rotations greater than 15 degrees. While the achieved and predicted tooth movement discrepancy was very minimal, it was found that overbite must be overcorrected.
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|Treatment Effectiveness of the Invisalign® System: A Systematic Review
|Sciote, James J.
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