• DOI:10.2319/061614-436.1
• Corpus ID: 10787375

Efficacy of clear aligners in controlling orthodontic tooth movement: a systematic review.

@article{Rossini2015EfficacyOC,
  title={Efficacy of clear aligners in controlling orthodontic tooth movement: a systematic review.},
  author={Gabriele Rossini and Simone Parrini and Tommaso Castroflorio and Andrea Deregibus and C. Debernardi},
  journal={The Angle orthodontist},
  year={2015},
  volume={85 5},
  pages={
          881-9
        }
}

• G. Rossini, S. Parrini, +2 authors C. Debernardi
• Published 1 September 2015
• Medicine
• The Angle orthodontist

OBJECTIVE
To assess the scientific evidence related to the efficacy of clear aligner treatment (CAT) in controlling orthodontic tooth movement.

MATERIALS AND METHODS
PubMed, PMC, NLM, Embase, Cochrane Central Register of Controlled Clinical Trials, Web of Knowledge, Scopus, Google Scholar, and LILACs were searched from January 2000 to June 2014 to identify all peer-reviewed articles potentially relevant to the review. Methodological shortcomings were highlighted and the quality of the studies was ranked using the Cochrane Tool for Risk of Bias Assessment.

RESULTS
Eleven relevant articles were selected (two Randomized Clinical Trials (RCT), five prospective non-randomized, four retrospective non-randomized), and the risk of bias was moderate for six studies and unclear for the others. The amount of mean intrusion reported was 0.72 mm. Extrusion was the most difficult movement to control (30% of accuracy), followed by rotation. Upper molar distalization revealed the highest predictability (88%) when a bodily movement of at least 1.5 mm was prescribed. A decrease of the Little's Index (mandibular arch: 5 mm; maxillary arch: 4 mm) was observed in aligning arches.

CONCLUSIONS
CAT aligns and levels the arches; it is effective in controlling anterior intrusion but not anterior extrusion; it is effective in controlling posterior buccolingual inclination but not anterior buccolingual inclination; it is effective in controlling upper molar bodily movements of about 1.5 mm; and it is not effective in controlling rotation of rounded teeth in particular. However, the results of this review should be interpreted with caution because of the number, quality, and heterogeneity of the studies.