Do self-ligating brackets favor greater bacterial aggregation?

Authors

  • Matheus M. Pithon niversity of Southwestern Bahia (UESB)
  • Rogério L. dos Santos Federal University of Rio de Janeiro
  • Leonard Euller Nascimento Federal University of Rio de Janeiro
  • Amanda Osorio Ayres Federal University of Rio de Janeiro
  • Daniela Alvian Federal University of Rio de Janeiro
  • Ana Maria Bolognese Federal University of Rio de Janeiro

DOI:

https://doi.org/10.20396/bjos.v10i3.8641633

Keywords:

Orthodontic brackets, Microbiology, Dental plaque, Biofilms

Abstract

Aim: To verify the hypothesis that self-ligating brackets favor greater aggregation of microorganisms when compared with conventional brackets. Methods: Four types of self-ligating metal brackets were evaluated. Initially, 50 brackets were divided into five groups (n=10): Morelli Conventional, GAC (In-Ovation R, Dentsply Caulk), Aditek (Easy Clip), Ormco (Damon System) and 3M Unitek (Smart Clip). An in vivo evaluation was carried out in which the brackets were bonded to the mandibular teeth of five healthy individuals who had not undergone previous orthodontic treatment. The right hemiarch brackets were used for bacterial plaque collection and those on the left side were examined by scanning electron microscopy (SEM). Before bracket bonding, the bacterial plaque material aggregated to the tooth surfaces was collected, with the areas of choice being the cervical-buccal and mesial and distal interproximal regions. After 21 days had elapsed since bonding, the plaque adhered to the winglet, channel and cervical regions of the bracket bases was collected. The materials collected were diluted and seeded on Petri dishes onto Mitis salivarius medium specific for S. mutans and non-specified BHI culture medium. Colony forming unit (CFU) counts were performed visually after 24, 48 and 72 h of incubation. Results: Greater bacterial accumulation was observed on the winglets of 3M brackets, with statistical statistically significant differences from the other types (p<0.05). As regards the channel regions, most microorganisms accumulated in the Ormco Group (p<0.05), and in the cervical region of Aditek brackets. In all evaluated regions, those with least bacterial accumulation were the conventional brackets. Conclusions: The hypothesis was confirmed, as the self-ligating brackets were shown to have greater bacterial accumulation when compared with the conventional brackets.

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Author Biographies

Matheus M. Pithon, niversity of Southwestern Bahia (UESB)

Professor of Orthodontics, University of Southwestern Bahia (UESB), Bahia

Rogério L. dos Santos, Federal University of Rio de Janeiro

PhD student in Orthodontics; Federal University of Rio de Janeiro, Rio de Janeiro, RJ

Leonard Euller Nascimento, Federal University of Rio de Janeiro

PhD student in Orthodontics; Federal University of Rio de Janeiro, Rio de Janeiro, RJ

Amanda Osorio Ayres, Federal University of Rio de Janeiro

PhD student in Orthodontics; Federal University of Rio de Janeiro, Rio de Janeiro, RJ

Daniela Alvian, Federal University of Rio de Janeiro

Adjunct Professor of Microbiology, Federal University of Rio de Janeiro

Ana Maria Bolognese, Federal University of Rio de Janeiro

Full Professor of Orthodontics, Federal University of Rio de Janeiro

Published

2015-11-09

How to Cite

1.
Pithon MM, Santos RL dos, Nascimento LE, Ayres AO, Alvian D, Bolognese AM. Do self-ligating brackets favor greater bacterial aggregation?. Braz. J. Oral Sci. [Internet]. 2015 Nov. 9 [cited 2022 Dec. 10];10(3):208-12. Available from: https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8641633

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