Cited by 763Bacterial biofilms and quorum sensingOral microbiology and periodontitis researchDental materials and restorations

Dental Plaque as a Microbial Biofilm

Marsh, P.D.·2004·Caries Research

Abstract

New technologies have provided novel insights into how dental plaque functions as a biofilm. Confocal microscopy has confirmed that plaque has an open architecture similar to other biofilms, with channels and voids. Gradients develop in areas of dense biomass over short distances in key parameters that influence microbial growth and distribution. Bacteria exhibit an altered pattern of gene expression either as a direct result of being on a surface or indirectly as a response to the local environmental heterogeneity within the biofilm. Bacteria communicate via small diffusible signalling molecules (e.g. competence-stimulating peptide, CSP; autoinducer 2); CSP induces both genetic competence and acid tolerance in recipient sessile cells. Thus, rates of gene transfer increase in biofilm communities, and this is one of several mechanisms (others include: diffusion-reaction, neutralization/inactivation, slow growth rates, novel phenotype) that contribute to the increased antimicrobial resistance exhibited by bacteria in biofilms. Oral bacteria in plaque do not exist as independent entities but function as a co-ordinated, spatially organized and fully metabolically integrated microbial community, the properties of which are greater than the sum of the component species. A greater understanding of the significance of dental plaque as a mixed culture biofilm will lead to novel control strategies.

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  • Bacteria embedded in biofilms can be up to 1000 times more tolerant toward antimicrobials than their planktonic counterparts.

    “bacteria embedded in biofilms can be up to 1000 times more tolerant toward antimicrobials than their planktonic counterparts.294,295”

    From The dental plaque biofilm matrix (2021) · cites this paper as [295]

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Research works printed but not linked: 9

  1. Abraham SN, Jonsson A-B, Normark S: Fimbriaemediated host pathogen cross-talk. Curr Opin Microbiol 1998;1:75-81.
  2. Lamont RJ, Jenkinson HF: Adhesion as an ecological determinant in the oral cavity; in Kuramitsu HK, Ellen RP (eds): Oral Bacterial Ecology: The Molecular Basis. Wymondham, Horizon Scientific Press, 2000, pp 131-168.
  3. Larsen T, Fiehn NE: Resistance of Streptococcus sanguis biofilms to antimicrobial agents. APMIS B 1996;104:280-284.
  4. Marsh PD: Oral ecology and its impact on oral microbial diversity; in Kuramitsu HK, Ellen RP (eds): Oral Bacterial Ecology: The Molecular Basis. Wymondham, Horizon Scientific Press, 2000a, pp 11-65.
  5. Marsh PD, Nyvad B: The oral microflora and biofilms on teeth; in Fejerskov O, Kidd EAM, (eds): Dental Caries: The Disease and Its Clinical Management. Oxford, Blackwell, 2003, pp 29-48.
  6. Merritt J, Qi F, Goodman SD, Anderson MH, Shi W: Mutation of luxS affects biofilm formation in Streptococcus mutans . Infect Immun 2003; 71:1972-1979.
  7. Munson MA, Banerjee A, Watson TF, Wade WG: Molecular analysis of the microflora associated with dentinal caries (abstract). Caries Res 2003;37:297.
  8. Vroom JM, de Grauw KJ, Gerritsen HC, Bradshaw DJ, Marsh PD, Watson GK, Allison C, Birmingham JJ: Depth penetration and detection of pH gradients in biofilms using two-photon excitation microscopy. Appl Environ Microbiol 1999;65:3502-3511.
  9. Walker CB, Tyler KT, Low SB, King CJ: Penicillindegrading enzymes in sites associated with adult periodontitis. Oral Microbiol Immunol 1987;2:129-131.

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Authors
Marsh, P. D.
Affiliations
Health Protection Agency (GB)
Corresponding author
Marsh, P.D.
Venue
Caries Research
Publisher
S. Karger AG
Published
2004
Volume
38
Issue
3
Pages
204-211
ISSN
  • 0008-6568 (ISSN-L)
  • 1421-976X
OpenAlex
W2093290488
Cited by
763
References
74
Citations by year
2026: 23 · 2025: 26 · 2024: 46 · 2023: 33 · 2022: 34 · 2021: 52 · 2020: 58 · 2019: 38 · 2018: 43 · 2017: 49 · 2016: 35 · 2015: 31 · 2014: 38 · 2013: 36 · 2012: 48
FWCI
7.70
Type
journal article
Language
en
Open access
closed
Locations
  • Caries Research (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bacterial biofilms and quorum sensing
  • Health Sciences › Dentistry › Periodontics › Oral microbiology and periodontitis research
  • Health Sciences › Dentistry › Orthodontics › Dental materials and restorations
Keywords
dental plaque, biofilm, oral bacteria, biofilm structure, environmental heterogeneity, gene expression, quorum sensing, competence-stimulating peptide, autoinducer-2, genetic competence, acid resistance, horizontal gene transfer, antimicrobial resistance, microbial communities, mixed-culture biofilms, plaque control
MeSH terms
Bacterial Adhesion, Cell Communication, Dental Plaque, Humans, Gene Expression Regulation, Bacterial, Ecosystem, Biofilms, Gene Transfer, Horizontal, Drug Resistance, Bacterial

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