Document Detail

Relationship between bacterial counts, microbial vitality and the accumulation of supragingival dental plaque in humans.
MedLine Citation:
PMID:  1460546     Owner:  NLM     Status:  MEDLINE    
Comparisons between plaque index (PlI) and bacterial counts have been made already; however, these did not take into account the area used for plaque sampling. The objective of the present study was to determine the correlation between the PlI score, the number of bacteria and the bacterial plaque vitality when dental plaque was repeatedly sampled from the same area in each subject during early plaque accumulation. Between intervals of optimal oral hygiene, 10 participants refrained from all oral hygiene measures for periods of 1, 2, 3, 4 and 5 days. The PlI was recorded on the vestibular surface of all first premolars as local PlI:LS. For statistical reasons, the scores of the independent variable LS were added for each subject giving LS* values ranging from 0 to 8. The plaque sampled from this specific surface was circumscribed by the marginal gingiva and an acrylic splint, giving reproducible areas for plaque collection. Total microscopic bacterial counts (BC), colony forming units of anaerobes (CFUan) and aerobes (CFUae), and proportions of vital bacteria (VF) were compared with LS* values. BC and LS* values were strongly correlated. CFUan and CFUae increased significantly with LS*, but this increase was higher for LS* 0 to 4 than for LS* 4 to 8. The ratio between vital and dead microorganisms, assessed by two different methods, was low when an LS* of 0 was recorded, with higher ratios registered for LS* values 4 and 8.
R Weiger; L Netuschil; M Brecx
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of periodontal research     Volume:  27     ISSN:  0022-3484     ISO Abbreviation:  J. Periodont. Res.     Publication Date:  1992 Nov 
Date Detail:
Created Date:  1993-01-11     Completed Date:  1993-01-11     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0055107     Medline TA:  J Periodontal Res     Country:  DENMARK    
Other Details:
Languages:  eng     Pagination:  575-80     Citation Subset:  D; IM    
Department of Conservative Dentistry, School of Dental Medicine, University of Tübingen.
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MeSH Terms
Bacteria, Anaerobic / growth & development*
Colony Count, Microbial
Dental Plaque / microbiology*
Dental Plaque Index*
Fluorescent Dyes
Microscopy, Fluorescence
Reg. No./Substance:
0/Fluorescent Dyes

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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