The Subgingival Microbiota in older subjects. Impact of Chlorhexidine Rinsing

Hirschi, Regula; Yeates, Justin; Weibel, Marianne; Persson, Rigmor; Kiyak, H. Asuman; Persson, Gösta Rutger (2006). The Subgingival Microbiota in older subjects. Impact of Chlorhexidine Rinsing. In: Pan European Federation of IADR (PEF 2006). Dublin Ireland. September 13-16, 2006.

Background: Periodontitis and caries are common diseases in older adults. Aims: To test if rinsing with chlorhexidine over five years has an impact on the subgingival microbiota. Methods: In a double blind randomized five years chlorhexidine rinse study clinical oral data and subgingival plaque samples were analyzed by the checkerboard DNA-DNA hybridization method. Results: At year 5 subject mean age was 71.2 years (S.D. + 4.1) (56.2% women). Only in subjects with no bone loss did the chlorhexidine rinse group subjects presented with lower total bacterial (DNA) counts (mean diff: 63.1 (x105), S.E diff + 30.1 (x105), 95%CI: 0.8 to 120.5 (x105), p<0.05) [(i.e.Lactobacillus acidophilicus (p<0.05) , Streptococcus oralis (p<0.05), Eikenella. corrodens (p< 0.05), C. gracilis (p<0.01), F.nucl.sp. nucleatum (p< 0.02), Fusobacterium nucl. sp. polymorphum (p<0.02), Neisseria mucosa (p<0.02), Leptothrichia buccalis (p<0.02), and Selenomonas noxia (p<0.050)]. Higher bacterial loads were found for the green (p<0.05), yellow (streptococci spp) (p<0.01), and the ‘other' complexes (p<0.01). Conclusions: Independent of probing pocket depth, older subjects carry a large variety of bacteria associated with periodontitis. The oral microbiota in older subjects is linked to alveolar bone loss and not to probing depth. Chlorhexidine may provide a benefit in preventing periodontitis in older persons.

Item Type:

Conference or Workshop Item (Abstract)


04 Faculty of Medicine > School of Dental Medicine > Department of Periodontology

UniBE Contributor:

Hirschi, Regula, Weibel, Marianne, Persson, Rigmor, Persson, Gösta Rutger


600 Technology > 610 Medicine & health




Eveline Carmen Schuler

Date Deposited:

04 Oct 2013 14:52

Last Modified:

05 Dec 2022 14:16

Additional Information:

Abstract 0786

URI: (FactScience: 19592)

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