[The presence of Actinobacillus actinomycetemcomitans in subgingival bacterial plaque in relation to the amount of supragingival plaque].
Actinobacillus actinomycetemcomitans (Aa) is currently considered the principal bacterium involved in juvenile forms of periodontitis. Considering that supragingival and subgingival plaque are closely correlated, the aim of the present research has been to assess if a correlation can be recognized between the amount of supragingival plaque and the presence of Aa in subgingival plaque in young subjects. Thirty-three individuals participated in the study. In each subject's dentition two periodontal sites were chosen: one (test site) was randomly selected among those sites which displayed a Plaque Index (P1I) = 0; another site was similarly chosen among those which presented the highest P1I score (2 or 3). In each test and control site Gingival Bleeding Index (GBI) was recorded and a microbiological sampling of subgingival plaque was performed. After anaerobic culture of plaque samples, the occurrence of Aa in each test and control site and the proportional representation of the bacterium in total cultivable anaerobic flora were assessed. Results showed a statistically significant difference in the occurrence of Aa between test and control sites in the same oral cavity and a correlation between GBI positivity and Aa presence. In conclusion, according to other authors, Aa seems to be more frequently founded in subgingival plaque coming from periodontal sites where supragingival plaque in more abundant.
Paolantonio
M
M
Istituto di Discipline Odontostomatologiche, Università degli Studi G. D'Annunzio, Chieti.
Fanali
S
S
Di Girolamo
G
G
Di Genova
S
S
D000293:Adolescent; D000328:Adult; D016976:Aggregatibacter actinomycetemcomitans / Q000302:isolation & purification*; D016009:Chi-Square Distribution; D002648:Child; D015169:Colony Count, Microbial / Q000706:statistics & numerical data; D016001:Confidence Intervals; D003773:Dental Plaque / Q000382:microbiology*; D003774:Dental Plaque Index; D005260:Female; D005881:Gingiva / Q000382:microbiology*; D006801:Humans; D008297:Male; D010512:Periodontal Index; D011897:Random Allocation
Presenza di Actinobacillus actinomycetemcomitans nella placca batterica sottogengivale in relazione alla quantità di placca batterica sopragengivale.