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Ex vivo gingival-biofilm consortia
L Vitkov1, M Hannig, W D Krautgartner
1Department of Operative Dentistry and Periodontology, Saarland University, Homburg/Saar, Germany. lvitkov@yahoo.com
Letters in Applied Microbiology
|October 22, 2005
Summary
Researchers developed a simple method to collect gingival-biofilm samples. These ex vivo oral biofilms show high bacterial viability and metabolic activity, differing significantly from supragingival plaque.
Area of Science:
- Microbiology
- Oral Biology
- Biomaterials
Background:
- Gingival-biofilm consortia represent a complex microbial community.
- Understanding the characteristics of ex vivo oral biofilms is crucial for oral health research.
Purpose of the Study:
- To establish a protocol for harvesting ex vivo gingival-biofilm samples.
- To characterize the basic properties of these gingival-biofilm consortia.
Main Methods:
- Smear collection of gingival epithelial cells with attached biofilm from healthy subjects.
- Confocal laser-scanning microscopy for bacterial viability and metabolic activity assessment.
- Scanning and transmission electron microscopy for morphological analysis.
Main Results:
- Electron microscopy revealed fimbriae-mediated adhesion and biofilm matrix formation.
- Most bacteria within the ex vivo biofilm were viable with high metabolic activity.
- Gingival-biofilm consortia exhibited distinct viability and zonal distribution compared to supragingival plaque.
Conclusions:
- A straightforward protocol for harvesting ex vivo gingival-biofilm samples was developed.
- Ex vivo gingival biofilms possess unique characteristics, including high metabolic activity, not observed in vitro or in supragingival plaque.
- These ex vivo samples are suitable for studying oral biofilm resistance to antibiotics and biocides.