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Peri-implantitis-associated methanogens: a preliminary report

Souad Belkacemi1, Anthony Mazel2, Delphine Tardivo2

  • 1Aix-Marseille Univ, IRD, MEPHI, IHU Méditerranée-Infection, Marseille, France.

Scientific Reports
|June 23, 2018
PubMed

Insights

Methanogens, including Methanobrevibacter oralis, are common in the oral cavity and do not show increased prevalence in peri-implantitis compared to healthy sites. These findings suggest methanogens are part of normal oral flora, not specific pathogens in peri-implantitis.

Area of Science:

  • Oral microbiology
  • Periodontal disease research
  • Implant dentistry

Background:

  • Methanogens are known to be present in periodontitis.
  • Their role in peri-implantitis, an inflammation around dental implants, is not well understood.
  • This study investigates the presence and prevalence of methanogens in peri-implantitis.

Purpose of the Study:

  • To determine if methanogens are more prevalent in peri-implantitis lesions compared to healthy peri-implant sites.
  • To identify specific methanogen species associated with peri-implantitis.
  • To assess the potential pathogenic role of methanogens in peri-implantitis.

Main Methods:

  • Collected 30 peri-implantitis and 28 control samples from 28 patients.
  • Utilized PCR-sequencing of the 16S rRNA gene for broad screening.
  • Employed real-time quantitative PCR targeting mcrA genes for confirmation and load assessment.

Main Results:

  • Methanogen communities, primarily Methanobrevibacter oralis, were detected in 51% of samples.
  • Prevalence of Methanobrevibacter oralis and Methanobrevibacter massiliense did not significantly differ between peri-implantitis and control groups.
  • Methanogen load also showed no significant difference between diseased and healthy sites.

Conclusions:

  • The prevalence and load of methanogens are similar in peri-implantitis lesions and healthy peri-implant sites.
  • Methanogens are likely part of the normal commensal flora of the oral cavity.
  • Current data do not support a specific pathogenic role for methanogens in peri-implantitis.

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