Methods: The analysis was performed with 150 pregnant women. The examination consisted of an evaluation of bleeding, suppuration, probing depths, clinical attachment levels, hypermobility scores, the Silness and Loe Plaque Index, € and the Loe and the Silness Gingival Index. Each periodontal pathogen was € identiﬁed by polymerase chain reaction.
Results: A statistically-signiﬁcant association was observed (P < 0.01) between P. gingivalis and T. forsythia, between P. gingivalis and T. denticola, and between T. forsythia and T. denticola. Age was observed to be a risk factor in the development of moderate periodontitis (odds ratio [OR] = 4.92, 95% con- ﬁdence interval [CI] = 1.1–21.3, P = 0.0328). Age was signiﬁcantly associated with increased pocket depth and plaque index (OR = 6.36, 95% CI = 1.8–22.2, P = 0.0037). In pregnant women, the presence of P. gingivalis was found to increase the risk of developing a clinical attachment level 5 mm.
Conclusion: A high prevalence of P. gingivalis in pregnant women, especially in combination with T. forsythia and T. denticola, was associated with an increased risk of developing moderate periodontitis, and that association was more marked in pregnant women aged 30 years or older.
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