Association Between Periodontal Pathogens and Inflammation in Patients with Acute Coronary Syndromes

(1) The link between periodontal disease (PD) and acute coronary syndromes (ACSs) is predominantly attributed to the atherosclerotic process, mediated by systemic inflammation. However, the correlation between the severity of PD, characterized by the presence of periodontal pathogens, and systemic inflammation in patients with ACS remains inadequately clarified. (2) This study aims to assess the association between the severity of PD and systemic inflammatory biomarkers, along with lipid profiles, in patients with ACS. (3) In total, 42 patients with ACS and concomitant PD were divided into two groups based on the presence of periodontal pathogens belonging to the red or red-orange complexes. Group 1-29 patients displayed pathogens from the red complex (RC) and group 2-13 patients displayed pathogens from the red-orange complex (ROC). All participants underwent a comprehensive dental examination, including DNA sampling from the periodontal pockets for pathogen detection. Systemic inflammation was evaluated alongside assessments of lipid profiles. (4) Inflammatory markers were more pronounced in the RC group compared with the ROC group. Moreover, patients in the RC group showed significantly higher monocyte-to-lymphocyte ratios (0.41 ± 0.20 vs. 0.28 ± 0.12; <i>p</i> = 0.002), platelet-to-lymphocyte ratios (139.50 ± 33.85 vs. 100.90 ± 8.84; <i>p</i> = 0.02), serum C-reactive protein levels (9.34 ± 1.08 mg/L vs. 5.46 ± 1.03 mg/L; <i>p</i> = 0.03), and serum uric acid levels (6.9 ± 0.49 mg/dL vs. 5.4 ± 0.26 mg/dL; <i>p</i> = 0.006). Concerning lipid profiles, the RC group exhibited significantly higher low-density lipoprotein cholesterol (LDL) levels (169.60 ± 12.63 mg/dL vs. 106.70 ± 9.34 mg/dL; <i>p</i> = 0.0007) and significantly lower high-density lipoprotein cholesterol (HDL) levels (29.29 ± 3.50 mg/dL vs. 39.56 ± 2.07 mg/dL; <i>p</i> = 0.002). (5) The severity of PD, indicated by the concomitant presence of pathogens from the red and orange complexes, is associated with an unfavorable lipid profile and elevated inflammatory biomarkers. These findings highlight the potential importance of periodontal intervention in the prevention of ACS.