Subgingival microbial profiles in chronic periodontitis patients from Chile, Colombia and Spain
: David Herrera, Adolfo Contreras
: Blackwell Synergy
Aim: To investigate the subgingival microbiota of distinct periodontitis patient
populations, in Chile, Colombia and Spain, using identical clinical and bacteriological
Material and Methods: In this multicentre study, 114 chronic periodontitis patients
were selected. Patients were examined using an identical clinical protocol and pooled
subgingival samples were obtained from each patient. Samples were processed in the
three laboratories by means of culturing under identical clinical and microbiological
protocols. Total anaerobic counts and frequency of detection and proportions of nine
periodontal pathogens were calculated. Variables were analysed by means of ANOVA,
w2, KruskalÃ¢â‚¬â€œWallis and DunnÃ¢â‚¬â„¢s multiple comparison tests.
Results: The Colombian population demonstrated greater severity of periodontitis,
with significantly deeper mean probing pocket depth, and had a significantly lower
percentage of current smokers. When comparing samples from the three patient
populations, the total counts were significantly higher in the Colombian patients. The
numbers of putative pathogens differed among groups. Tannerella forsythia was found
less frequently in Chilean samples, while Parvimonas micra and enteric rods differed
significantly among the three population groups.
Conclusion: Significant differences among Chile, Colombia and Spain existed
regarding the frequency and proportions of specific periodontal pathogens in the
subgingival microbiota of periodontitis patients.
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