Rosa Carrieri Rossi*
Division of Pediatric Otolaryngology, Federal University of Sao Paulo, UNIFESP, Brazil
*Corresponding Author: Rosa Carrieri Rossi, Division of Pediatric Otolaryngology, Federal University of Sao Paulo, UNIFESP, Brazil.
Received: October 10, 2017; Published: October 29, 2017
Citation: Rosa Carrieri Rossi. “Predictability of the Expression of Torques in Preadjusted Brackets-A Critical Review”. Acta Scientific Dental Sciences 1.5 (2018).
To evaluate the hypothesis that the amount of buid-in torque of preadjusted brackets is the same as obtained at the end of orthodontic treatment, the authors searched the databases Pubmed, Medline and Google Scholar with the Keywords: orthodontics, corrective, AND orthodontics, brackets AND orthodontics, tooth movement translated into Portuguese and Spanish with the filters: clinical trial and review, with the types of article: systematic review, Technical report and Randomized controlled Trial in the last twenty years. 379 articles that were manually selected to filter those referring to the initial and final comparison of the bracket torques. Of this search, there were 21 articles that referred directly to the incorporation of buccolingual movement with the application of rectangular arches in preadjusted brackets.
Due to the overlap of evaluation types on different dates, we divide the topics into three blocks. In vitro studies were used to access the factors related to the physical characteristics of the materials, clinical articles with comparison of models and cephalometric tracings and by the comparison of images segmented by cone beam computed tomography to find the diferences of predict and obtained torque. It was concluded that:
• The predictability of obtaining the torques provided for in preadjusted bracket prescriptions can be challenged by variables re- lated to the composition of the materials used, the design of the arches used, the malleability of the strands and the relationship between the bracket slot capacity and the size of the arches. The difference of trademarks does not seem to change these factors.
• The degree of crowding and leveling of the curve of Spee increased labial torque in cases made without extractions and most studies done by comparison of models and cephalometry seems to indicate that the predominant movement in the treatments is the proclination of the teeth.
• The studies done by segmentation of the teeth by cone beam tomography indicate that the treatment without extractions made with self-ligating brackets causes the effect of greater labial torque in the anterior teeth.
Keywords: Torques; Preadjusted Brackets; Expression
Copyright: © 2018 Rosa Carrieri Rossi. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.