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Oral microbiology and periodontitis research
Research Guide
What is Oral microbiology and periodontitis research?
Oral microbiology and periodontitis research is the scientific study of microbial communities in the oral cavity, particularly subgingival plaque biofilms, and their role in the etiology, pathogenesis, and treatment of periodontitis as a chronic inflammatory disease.
The field encompasses over 124,258 published works examining bacterial biofilms and their resistance mechanisms in periodontal infections. Key studies have identified microbial complexes in subgingival plaque, with Socransky et al. (1998) defining distinct bacterial communities using clustering techniques on large plaque samples. Biofilm formation, as described by Costerton et al. (1999), underlies persistent infections due to antimicrobial resistance within hydrated polymeric matrices.
Research Sub-Topics
Porphyromonas gingivalis Pathogenesis
This sub-topic examines the virulence factors, invasion mechanisms, and host interactions of Porphyromonas gingivalis, a keystone pathogen in periodontitis. Researchers study its role in dysbiosis, immune evasion, and links to systemic diseases through molecular and genomic approaches.
Subgingival Biofilm Dynamics
This area investigates the formation, architecture, and microbial succession within subgingival biofilms associated with periodontal disease progression. Studies employ metagenomics, imaging, and ecological modeling to characterize polymicrobial communities.
Periodontal Microbiome Dysbiosis
Researchers analyze shifts in subgingival microbial composition from health to disease states using 16S rRNA sequencing and metatranscriptomics. This sub-topic explores keystone taxa, inflammation triggers, and dysbiosis reversal therapies.
Antimicrobial Resistance in Periodontal Pathogens
This field studies mechanisms of antibiotic tolerance in periodontal biofilms, including efflux pumps, persister cells, and genetic resistance. Research evaluates novel antimicrobials and adjunctive therapies like photodynamic inactivation.
Host-Microbe Interactions in Periodontitis
Investigations focus on periodontal pathogen modulation of innate immunity, inflammasome activation, and barrier dysfunction in gingival tissues. Studies integrate genomics, proteomics, and animal models to link oral microbes to systemic inflammation.
Why It Matters
Oral microbiology and periodontitis research informs clinical strategies for managing chronic infections linked to systemic health issues. Costerton et al. (1999) in 'Bacterial Biofilms: A Common Cause of Persistent Infections' showed biofilms cause persistent infections with 11,814 citations, emphasizing their role in treatment resistance. Socransky et al. (1998) in 'Microbial complexes in subgingival plaque' identified specific bacterial groups in diseased sites, aiding targeted therapies. Recent preprints like 'Characterization of subgingival plaque microbiota in patients with severe periodontitis using full-length 16S rRNA gene sequencing' (2025) profile microbiota in 34 patients, supporting precision diagnostics. Armitage (1999) provided a classification system in 'Development of a Classification System for Periodontal Diseases and Conditions' used by clinicians to organize patient care, with 5054 citations.
Reading Guide
Where to Start
'Microbial complexes in subgingival plaque' by Socransky et al. (1998) first, as it provides foundational analysis of bacterial communities in periodontitis using data from numerous plaque samples, essential for understanding disease-specific microbiota.
Key Papers Explained
Costerton et al. (1999) 'Bacterial Biofilms: A Common Cause of Persistent Infections' establishes biofilms as the root of chronic infections, which Donlan and Costerton (2002) 'Biofilms: Survival Mechanisms of Clinically Relevant Microorganisms' extends to oral clinical contexts with EPS matrix details. Socransky et al. (1998) 'Microbial complexes in subgingival plaque' builds on this by clustering biofilm species in subgingival sites. Flemming and Wingender (2010) 'The biofilm matrix' details matrix composition, connecting to Stewart and Costerton (2001) 'Antibiotic resistance of bacteria in biofilms'. Armitage (1999) 'Development of a Classification System for Periodontal Diseases and Conditions' integrates these for disease categorization.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Recent preprints focus on high-resolution sequencing: 'Characterization of subgingival plaque microbiota in patients with severe periodontitis using full-length 16S rRNA gene sequencing' (2025) analyzes 34 patients' subgingival, supragingival, and tongue samples. 'Taxonomic and functional signatures of smoking and periodontitis severity in the subgingival microbiome of older adults' (2025) uses shotgun metagenomics on 1107 individuals aged 69–72. 'Longitudinal host-microbiome dynamics of metatranscription identify hallmarks of progression in periodontitis' (2025) tracks progression markers.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | Bacterial Biofilms: A Common Cause of Persistent Infections | 1999 | Science | 11.8K | ✕ |
| 2 | The biofilm matrix | 2010 | Nature Reviews Microbi... | 9.2K | ✕ |
| 3 | Periodontal Disease in Pregnancy II. Correlation Between Oral ... | 1964 | Acta Odontologica Scan... | 7.7K | ✓ |
| 4 | Periodontal Disease in Pregnancy I. Prevalence and Severity | 1963 | Acta Odontologica Scan... | 7.1K | ✓ |
| 5 | Biofilms: Survival Mechanisms of Clinically Relevant Microorga... | 2002 | Clinical Microbiology ... | 6.4K | ✓ |
| 6 | Development of a Classification System for Periodontal Disease... | 1999 | Annals of Periodontology | 5.1K | ✓ |
| 7 | Microbial complexes in subgingival plaque | 1998 | Journal Of Clinical Pe... | 4.9K | ✕ |
| 8 | Biofilms: Microbial Life on Surfaces | 2002 | Emerging infectious di... | 4.7K | ✓ |
| 9 | Antibiotic resistance of bacteria in biofilms | 2001 | The Lancet | 4.5K | ✕ |
| 10 | The Gingival Index, the Plaque Index and the Retention Index S... | 1967 | The Journal of Periodo... | 3.6K | ✕ |
In the News
Active Oxygen Releasing Gel With Photodynamic Therapy ...
ClinicalTrials.gov Show glossary Hide glossary #### Glossary Study record managers: refer to the Data Element Definitions if submitting registration or results information. Search for terms
Dr. Flavia Teles Recognized with 2025 American Academy of ...
periodontal diseases. Dr. Teles was recognized as lead author for the paper,[*Salivary and serum inflammatory biomarkers during periodontitis progression and after treatment.*J Clin Periodontol. Te...
Characterization of subgingival plaque microbiota in patients with severe periodontitis using full-length 16S rRNA gene sequencing
## Funding This work was supported by JSPS KAKENHI Grant Numbers: JP24K20113 (J.M.), JP24K02660 (S.K.), JP25K02838 (T.T.), JP24K22192 (T.T.), and JP25K13317 (M.A.), and the Kakihara Science and Tec...
Longitudinal host-microbiome dynamics of metatranscription identify hallmarks of progression in periodontitis
# Longitudinal host-microbiome dynamics of metatranscription identify hallmarks of progression in periodontitis * Research * Open access * Published:14 May 2025 * Volume 13, article number119, (2025)
Advancing periodontitis microbiome research: integrating design, analysis, and technology
Han Y and Ding P-H (2025) Advancing periodontitis microbiome research: integrating design, analysis, and technology. Front. Cell. Infect. Microbiol. 15:1616250. doi: 10.3389/fcimb.2025.1616250 COPY...
Code & Tools
# Illuminating the oral microbiome and its host interactions: recent advancements in omics and bioinformatics technologies in the context of oral m...
## About Analyzing the genomic and metagenomic features of SGB748 MAGs from oral samples to uncover their role in health and peri-implant diseases...
# A single cell atlas of human teeth Healthy periodontium and pulp single-cell data # Citation The code in this repository pertains to publicat...
| Integrated metagenomic data analysis demonstrates that a loss of diversity in oral microbiota is associated with periodontitis.pdf | [Integrated ...
This repository contains all of the code used to analyze results found in Nearing et al., 2020 "Assesing the variation within the oral microbiome o...
Recent Preprints
Characterization of subgingival plaque microbiota in patients with severe periodontitis using full-length 16S rRNA gene sequencing
Periodontitis is a widespread global health issue with significant systemic health implications. Subgingival plaque microbiota is considered its driving factor. Thus, accurate profiling of the micr...
Oral Microbiome in Periodontal Disease: Where Are We Now?
oral health and disease. Periodontol 2000. 2021 [cited 2024 Dec 13];87(1):107–31. Available from: https://pubmed.ncbi.nlm.nih.gov/34463991/ Abusleme L, Dupuy AK, Dutzan N, Silva N, Burleson JA, Str...
Taxonomic and functional signatures of smoking and periodontitis severity in the subgingival microbiome of older adults
Periodontitis and smoking are major contributors to oral and systemic health deterioration in aging adults. This study investigated the combined effects of smoking status and periodontitis severity...
The Oral–Gut–Systemic Axis: Emerging Insights into ...
The oral cavity harbors one of the most diverse microbial ecosystems in the human body, second only to the gut. Periodontitis, a chronic inflammatory disease arising from oral microbiota dysbiosis,...
Salivary and Microbiome Biomarkers in Periodontitis
## 4. Oral Microbiome and Biomarkers in Periodontitis ### 4.1. Dysbiosis as a Central Concept
Latest Developments
Recent developments in oral microbiology and periodontitis research include the identification of new therapeutic approaches such as senotherapy using natural compounds like quercetin, which has shown promise in reducing markers of senescence in periodontal disease models (Penn Dental Medicine, April 2025). Additionally, advances in microbiome research emphasize the importance of studying bacterial communities within periodontal tissues and biofilms, with metatranscriptomics revealing functional changes and virulence factors in periodontitis (Frontiers in Microbiology, June 2025, Springer Nature Link, September 2025). These studies highlight ongoing efforts to understand microbial dynamics and develop targeted treatments for periodontal diseases.
Sources
Frequently Asked Questions
What role do biofilms play in periodontitis?
Biofilms form when bacteria attach to surfaces and aggregate in a hydrated polymeric matrix, leading to resistance against antimicrobial agents. Costerton et al. (1999) in 'Bacterial Biofilms: A Common Cause of Persistent Infections' established that this sessile community structure is central to chronic periodontal infections. Studies confirm biofilms occur universally in oral environments.
How are microbial complexes defined in subgingival plaque?
Socransky et al. (1998) in 'Microbial complexes in subgingival plaque' used clustering and ordination on large plaque samples to define bacterial communities. These complexes associate specific species in diseased sites. The analysis revealed organized groups beyond random aggregation.
What is the Gingival Index and its use in periodontitis research?
Löe (1967) introduced the Gingival Index, Plaque Index, and Retention Index in 'The Gingival Index, the Plaque Index and the Retention Index Systems' to quantify gingival inflammation, plaque accumulation, and retention factors. These indices enable standardized assessment of periodontal status. They have been applied in studies like Silness and Löe (1964) correlating oral hygiene with condition.
How does oral hygiene correlate with periodontal disease in pregnancy?
Silness and Löe (1964) in 'Periodontal Disease in Pregnancy II. Correlation Between Oral Hygiene and Periodontal Condition' demonstrated a direct correlation using plaque and gingival indices. Poor hygiene exacerbated periodontal conditions during pregnancy. Löe and Silness (1963) in the companion paper reported prevalence and severity data.
What classification system exists for periodontal diseases?
Armitage (1999) developed a framework in 'Development of a Classification System for Periodontal Diseases and Conditions' to study etiology, pathogenesis, and treatment systematically. It organizes clinical patient needs. The system updated prior classifications for scientific and practical use.
Why are biofilms resistant to antibiotics in oral infections?
Stewart and Costerton (2001) in 'Antibiotic resistance of bacteria in biofilms' explained resistance arises from the biofilm matrix and slow growth rates. Cells in biofilms upregulate protective genes. This applies to clinical oral pathogens.
Open Research Questions
- ? How do specific microbial complexes in subgingival plaque shift longitudinally during periodontitis progression?
- ? What host-microbiome metatranscription dynamics predict periodontitis advancement?
- ? Can full-length 16S rRNA sequencing resolve fine-scale taxonomic shifts in severe periodontitis microbiota?
- ? How do smoking and periodontitis severity interact to alter subgingival microbiome diversity and function?
- ? What salivary biomarkers distinguish periodontitis progression from treatment response?
Recent Trends
Recent preprints emphasize advanced sequencing: full-length 16S rRNA in 'Characterization of subgingival plaque microbiota in patients with severe periodontitis using full-length 16S rRNA gene sequencing' on 34 patients, and shotgun metagenomics in 'Taxonomic and functional signatures of smoking and periodontitis severity in the subgingival microbiome of older adults' (2025-12-29) showing reduced diversity from smoking in 1107 older adults.
2025-12-02GitHub repositories like jonbakerlab/oral-microbiome-omics-review advance omics bioinformatics.
News highlights Dr.
Flavia Teles' recognition for 'Salivary and serum inflammatory biomarkers during periodontitis progression and after treatment' , linking to systemic implications.
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