Grade C molar-incisor pattern periodontitis subgingival microbial profile before and after treatment

Irina M. Velsko, Peter Harrison, Natalia Chalmers, Jennifer Barb, Hong Huang, Ikramuddin Aukhil, Luciana Shaddox

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Aim: This study evaluated the influence of periodontal therapy on the microbiological profile of individuals with Grade C Molar-Incisor Pattern Periodontitis (C/MIP). Methods: Fifty-three African-American participants between the ages of 5–25, diagnosed with C/MIP were included. Patients underwent full mouth mechanical debridement with systemic antibiotics (metronidazole 250 mg + amoxicillin 500 mg, tid, 7 days). Subgingival samples were collected from a diseased and a healthy site from each individual prior to treatment and at 3, 6, 12, 18 and 24 months after therapy from the same sites. Samples were subjected to a 16S rRNA gene based-microarray. Results: Treatment was effective in reducing the main clinical parameters of disease. Aggregatibacter actinomycetemcomitans (A.a.) was the strongest species associated with diseased sites. Other species associated with diseased sites were Treponema lecithinolyticum and Tannerella forsythia. Species associated with healthy sites were Rothia dentocariosa/mucilaginosa, Eubacterium yurii, Parvimonas micra, Veillonella spp., Selenomonas spp., and Streptococcus spp. Overall, treatment was effective in strongly reducing A.a. and other key pathogens, as well as increasing health-associated species. These changes were maintained for at least 6 months. Conclusions:Treatment reduced putative disease-associated species, particularly A.a., and shifted the microbial profile to more closely resemble a healthy-site profile. ( registration #NCT01330719).

Original languageEnglish
Article number1814674
JournalJournal of Oral Microbiology
Issue number1
StatePublished - Jan 1 2020

Bibliographical note

Funding Information:
This research was supported by National Institutes of Health/National Institute of Dental and Craniofacial Research [R01DE019456]. We would like to thank the doctors and staff in Leon County and Duval county Dental Clinics for the assistance in our visits to the clinic and patient care.

Publisher Copyright:
© 2020 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.


  • A.a
  • Aggressive periodontitis
  • microarray
  • subgingival microbiota
  • therapy

ASJC Scopus subject areas

  • Dentistry (miscellaneous)
  • Microbiology (medical)
  • Infectious Diseases


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