To evaluate the relationship of obstructive sleep apnea with chronic periodontitis and its association with coronary artery disease by assessing serum tumor necrosis factor-α

The periodontal tissue initiates an immune-inflammatory response against bacteria and their products at the site of periodontal infection, and systemic attack by these pathogens triggers an acute phase response that contributes to the systemic inflammatory burden. Obstructive sleep apnea (OSA) and periodontal diseases share many common risk factors and are therefore disorders associated with, and possibly related to, systemic inflammation. Objectives 1.) To evaluate the severity of infection-causing chronic periodontitis subjects leading to Coronary Artery Disease (CAD) risk. 2.) To evaluate specific Inflammatory marker TNF-α in coronary artery disease (CAD) subjects with chronic periodontitis and obstructive sleep apnea. Methods A total of 5 ml of the venous blood was collected from each participant which was separated out by centrifugation at 3000 rpm for 5–10 min at room temperature for the estimation of inflammatory markers. Collected samples were labeled and stored at − 20 °C in a deep freezer. The estimation of human TNF-α (tumor necrosis factor-alpha) levels was determined using an ELISA kit based on the Sandwich-ELISA principle. Conclusion TNF-α may serve as important markers for the diagnosis of chronic periodontitis and obstructive sleep apnea and the prediction of the severity of cardiovascular diseases. Cardiovascular disease can be efficiently circumvented with a biomarker-based approach to treatment, which also benefits patients' quality of life. Results The result of our study showed that TNF-α is involved in the onset and progression of obstructive sleep apnea leading to coronary artery disease since the expression levels of TNF in the case group were considerably higher than those in the control group.