Treatment of Periodontal Disease in Systemic Lupus Erythematosus

The primary objective of this study is to: Part 1 - Baseline Comparisons The primary objective of Part 1 is to: Investigate the association between SLE and a measures of vascular health (brachial artery flow-mediated dilatyation) in patients with Systemic Lupus Erythematosus (SLE) and a healthy periodontium compared to patients with SLE and Periodontitis (PD) Part 2 - Pilot Randomized Clinical Trial To assess the effect of Periodontal Treatment (PT) on the endothelial function in a population of patients suffering from SLE and PD. Secondary Secondary objectives include: Part 1 - Baseline Comparisons The secondary objectives of Part 1 are to investigate the association of: * Inflammatory biomarkers in saliva and blood and periodontal status in patients with SLE and PD and those with SLE and a healthy periodontium * The oral microbiome using plaque analysis and periodontal status in patients with SLE and PD and those with SLE and a healthy periodontium Part ParPa Part 2 - Pilot Randomized Controlled Trial Evaluate the effect of PT on biomarkers of SLE disease severity/progression in a population of patients suffering from SLE and PD. Evaluate the effect of PT on the B cell panel in a population of patients suffering from SLE and PD. Evaluate effect of PT on the systemic inflammatory and oxidative profile of a population of patients suffering from SLE and PD. Evaluate effect of PT on skin lesions in a population of patients suffering from SLE and PD.