Información del artículo
Abstract
Background
Streptococcus mutans (S. mutans) is associated with the onset of caries. Since root exposure in patients affected by periodontitis leads to higher caries rates, progressively more severe forms of periodontal disease might associate with elevated counts of S. mutans.
AimTo determine whether increasingly destructive forms of periodontal disease are associated with higher counts of S. mutans in untreated patients.
Methods206 subjects aged 20–75 were classified into three groups according to the severity of periodontal disease: 1) gingivitis, 2) chronic slight periodontitis and 3) chronic moderate or chronic severe periodontitis. S. mutans counts (cfu/mL) were obtained by direct counting on selective agar plates from saliva samples. A cumulative proportional logistic regression model was adjusted for S. mutans counts.
ResultsThe model failed to show differences by gender, but periodontal diagnosis had a significant effect on S. mutans counts depending on age. While in the group with moderate and severe periodontitis the probability of having high counts of S. mutans significantly increased with age, the probability remained unchanged in individuals with chronic slight periodontitis or gingivitis.
ConclusionHigh S. mutans levels appear directly co-associated with increased severity of periodontal disease at older ages in untreated patients.
Key words:
Periodontitis
periodontal disease severity
Mutans Streptococci
Streptococcus mutans
caries
root caries
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