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Sulfate-reducing bacteria in association with human periodontitis
P S Langendijk1, J T Hanssen, J S Van der Hoeven
1Preventive Dentistry and Periodontology, Subfaculty of Dentistry, University of Nijmegen, The Netherlands.
Journal of Clinical Periodontology
|January 5, 2001
Summary
Sulfate-reducing bacteria (SRB) are linked to destructive periodontal diseases, accumulating in deep pockets and contributing to cellular damage. Their presence is significantly reduced in treated patients, indicating a potential therapeutic target.
Area of Science:
- Oral microbiology
- Periodontology
- Anaerobic bacteriology
Background:
- Sulfate-reducing bacteria (SRB) are strictly anaerobic and produce toxic sulfide, potentially contributing to destructive periodontal diseases.
- SRB require a degraded microbiota for energy, producing a reduced environment and fermentation products.
- Increased SRB detection frequency in periodontitis sites compared to healthy oral cavities.
Purpose of the Study:
- To determine the presence of SRB in relation to clinical features of periodontitis.
- To assess the association between SRB and site-specific parameters like pocket depth, bleeding, and attachment level.
- To evaluate SRB prevalence in different clinical categories of periodontitis.
Main Methods:
- Inclusion of 87 patients with severe periodontitis (78 untreated, 9 maintenance care).
- Sampling from 261 deepest periodontal pockets.
- SRB detection via enrichment culture in an anoxic chamber.
Main Results:
- SRB detected in 64% of patients and 44% of periodontal pockets.
- SRB prevalence correlated positively with increased pocket depth (p<0.05) and bleeding on probing.
- Higher SRB occurrence in pockets with furcations, angular bony defects, or endodontal complications.
- SRB associated with various periodontitis types, with 72% occurrence in adult periodontitis.
- Significantly reduced SRB prevalence in treated patients (p<0.02).
- Odds ratio of 11.2 for SRB in periodontal pockets versus healthy sites.
Conclusions:
- Periodontal SRB are associated with multiple clinical categories of periodontitis.
- SRB presence is linked to periodontal sites exhibiting increased pocket depth.
- SRB detection and reduction in treated patients suggest therapeutic relevance.