Biofilm Dynamics in Oral Hygiene Systems
Summary
Biofilms in the oral cavity represent highly organised microbial communities encased within a self-produced polymeric matrix that adheres to dental and mucosal surfaces. Their development proceeds through initial adhesion of pioneer species, intercellular aggregation and maturation, and they present marked resilience to mechanical and chemical challenges. Oral hygiene systems aim to disrupt biofilm integrity by combining mechanical shear forces—via brushing, interdental devices or sonic vibration—with antimicrobial agents delivered in toothpaste or mouthwash formulations. Fluid dynamics and surface properties influence biofilm detachment and recolonisation kinetics, while microbial composition and metabolic activity shift in response to repeated hygiene regimens. Control of these dynamics underpins prevention of caries, gingivitis and periodontal disease, and informs design of toothbrush bristles, irrigators and antimicrobial adjuncts. Advances in molecular profiling have revealed the coexistence of oral and environmental strains on hygiene instruments, and highlighted the role of extracellular polymeric substances in conferring resistance to biocidal compounds. A comprehensive strategy integrates mechanical removal, targeted antimicrobial delivery and modulation of shear forces to maintain ecological balance and oral health.
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Biofilm Dynamics in Oral Hygiene Systems publication trend
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Technical terms
Biofilm: A structured community of microorganisms embedded in a self-secreted extracellular polymeric matrix adherent to surfaces.
Extracellular polymeric substances (EPS): A complex mixture of polysaccharides, proteins and nucleic acids that forms the scaffold of a biofilm and mediates adhesion and protection.
Metagenomics: High-throughput sequencing of DNA extracted from environmental samples, enabling taxonomic and functional profiling of mixed microbial communities.
Shear stress: Mechanical force generated by fluid flow or vibration that influences biofilm detachment and structural disruption in hygiene devices.
References
- Toothbrush microbiomes feature a meeting ground for human oral and environmental microbiota. Microbiome (2021).
- Adjunct use of mouth rinses with a sonic toothbrush accelerates the detachment of a Streptococcus mutans biofilm: an in vitro study. BMC Oral Health (2020).
- Effect of Dextranase and Dextranase-and-Nisin-Containing Mouthwashes on Oral Microbial Community of Healthy Adults—A Pilot Study. Applied Sciences (2022).
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