Effects of Composite Attachments on Orthodontic Clear Aligners Therapy: A Systematic Review

Materials

Marco Portelli¹  Angela Militi¹  Serena Barbera¹  Angela Mirea Bellocchio¹  Stefania Costa¹  Lorenzo Rustico¹  Riccardo Nucera¹  Marco Farronato²  Carolina Dolci² 

[1] Department of Biomedical and Dental Sciences and Morphofunctional Imaging, Section of Orthodontics, University of Messina, 98125 Messina, Italy;Department of Biomedical, Surgical and Dental Sciences, Fondazione IRCCS Cà Granda—Ospedale Maggiore Policlinico, University of Milan, 20122 Milan, Italy;

关键词: invisible orthodontics;    clear aligner therapy;    clear aligners;    invisalign;    attachments;    auxiliary elements;   

DOI  :  10.3390/ma15020533

来源: DOAJ

【 摘 要 】

This systematic review aims to highlight the differences between different clear aligner therapies that differ in the presence of attachments or in attachment configuration. Eight electronic databases were searched up to March 2020. Two authors independently proceeded to study selection, data extraction, and risk of bias assessment. The analysis of the results was carried out examining six groups of movements (mesio-distal tipping/bodily movement; anterior bucco-lingual tipping/root torque; posterior bucco-lingual tipping/expansion; intrusion; extrusion; rotation). Five clinical trials were selected and all of them showed a medium risk of bias. Literature showed that attachments mostly increase the effectiveness of orthodontic treatment with clear aligners, improving anterior root torque, rotation, and mesio-distal (M-D) movement; they are also important to increase posterior anchorage. However, some articles showed contradictory or not statistically significant results. Attachments also seem to improve intrusion, but the evidence about this movement, as well as extrusion, is lacking. No studies evaluated posterior bucco-lingual tipping/expansion. Further clinical trials are strongly suggested to clarify the influence of attachments and their number, size, shape, and position on each orthodontic movement.

【 授权许可】

Unknown