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Related Experiment Videos

Microbial profile on metallic and ceramic bracket materials.

Patrick Anhoury1, Dan Nathanson, Christopher V Hughes

  • 1Department of Restorative Sciences/Biomatrials, Goldman School of Dental Medicine, Boston University, Mass 02118, USA.

The Angle Orthodontist
|August 10, 2002
PubMed
Summary
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Orthodontic brackets, both metallic and ceramic, showed no significant difference in plaque-retaining bacteria, including cavity-causing Streptococcus mutans. Specific bacterial species counts varied, but no bracket type consistently harbored more harmful microbes.

Area of Science:

  • Oral microbiology
  • Biomaterials science
  • Orthodontics

Background:

  • Orthodontic appliances can promote bacterial accumulation, increasing risks of caries and periodontal disease.
  • Understanding plaque retention on different bracket materials is crucial for oral health management during orthodontic treatment.

Purpose of the Study:

  • To compare bacterial counts on metallic versus ceramic orthodontic brackets.
  • To determine the plaque-retaining capacity of each bracket type.
  • To quantify levels of Streptococcus mutans and Lactobacillus spp. on both bracket types.

Main Methods:

  • Collected 32 metallic and 24 ceramic orthodontic brackets from patients at debonding.
  • Utilized "checkerboard" DNA-DNA hybridization to identify and quantify bacterial populations.

Related Experiment Videos

  • Employed the Mann-Whitney U-test to analyze differences in bacterial counts between bracket types.

    • Main Results:

    • No significant difference in counts of caries-associated Streptococcus mutans and Lactobacillus acidophilus was found between metallic and ceramic brackets.
    • Mean counts of 8 out of 35 other bacterial species differed significantly between the two bracket types.
    • Higher counts of specific bacteria like Treponema denticola were observed on metallic brackets, while Eikenella corrodens was more prevalent on ceramic brackets.

    Conclusions:

    • Neither metallic nor ceramic orthodontic brackets demonstrate a clear advantage in preventing the accumulation of caries-associated bacteria.
    • The composition of the oral microbiota on orthodontic brackets is complex and varies by species, irrespective of bracket material.
    • Further research is needed to fully elucidate the clinical implications of microbial differences on various orthodontic bracket surfaces.