Background The association between periodontitis and immuno‐mediated inflammatory diseases has been widely studied and recognized each more over the past few years. The aim of this study was to evaluate the potential association between psoriasis and periodontitis, as well as the influence of risk variables in this association. Methods This case‐control study included 756 individuals, 397 with psoriasis, and 359 controls. A full‐mouth periodontal examination was performed, recording therefore plaque index, probing depth, clinical attachment level, and bleeding on probing. The influence of risk variables was tested by univariate analysis and multivariate logistic regression. Results A high prevalence of periodontitis was observed among cases (46.1%) when compared to controls (33.1%). Individuals with psoriasis presented a 1.72 higher chance of having periodontitis than controls (OR = 1.72; 95% CI 1.28–2.32; p < 0.001) in the univariate analysis, but with no significance in the multivariate model. The prevalence of periodontitis increased significantly according to the severity of psoriasis [mild form (44.4%); moderate (46.3%); and advanced (47.1%)] when compared to the control group (33.1%). The final multivariate logistic model showed that the number of teeth (OR = 1.08; 95% CI 1.01–1.14; p = 0.018), smoking (OR = 1.91; 95% CI 1.19–3.07; p = 0.008), and body mass index (OR = 1.13; 95% CI 1.11–1.16; p < 0.001) remained significantly associated with the occurrence of periodontitis. Conclusions The prevalence of periodontitis was higher in individuals with psoriasis than in controls. Severity of psoriasis also presented a strong relationship with all periodontal clinical parameters.

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Psoriasis is a chronic inflammatory skin disease, characterized by dermis and epidermis inflammation and by itching, scaly red spots, papules, and plaques (Zargari, 2006). It has a prevalence of 2%-4% in the general population, leading to significant impacts on physical and emotional health related to quality of life (QoL) (Boehncke & Schön, 2015;Christophers, 2001).Contributing factors as environmental causative agents of the disease include trauma, staphilocossis sp, streptococcis sp, HIV infections, candida species, medications, stress, smoking, and alcohol

Background Prospective studies investigating the influence of adjuvants to oral hygiene procedures on the recurrence of periodontitis (RP) during periodontal maintenance therapy (PMT) programs have not been previously reported. The aim of this study was to compare the effect of oral irrigator devices or interdental brushes as adjuncts to toothbrushing associated with dental flossing to improving periodontal condition and reducing RP among individuals under PMT. Methods From a 6‐year prospective PMT cohort study (n = 268), 142 individuals who attended at least one PMT visit within 12 months were determined to be eligible. According to oral hygiene adjuvants use, they were categorized into three groups: 1) manual brushing/dental flossing + interdental brushes (BDF + Ib; n = 44); 2) manual brushing/dental flossing + oral irrigator (BDF + Oi; n = 36); and 3) only manual brushing/dental flossing (BDF; n = 62). Full‐mouth periodontal examination and oral hygiene habits were evaluated at two time points: T1 (after active periodontal therapy) and T2 (6 years). Results RP was significantly higher among BDF when compared with BDF + Ib and BDF + Oi. The final logistic model in T2 for RP included the following items: manual brushing/dental flossing alone (odds ratio [OR] = 1.94); age > 50 years (OR = 1.98), smoking (OR = 3.51), bleeding on probing >30% sites (OR = 4.10), and the interaction between manual brushing/dental flossing alone and smoking (OR = 6.1). A protective effect on RP was observed in BDF + Oi individuals (OR = 0.52). Conclusions BDF + Ib and BDF + Oi individuals presented lower rates of RP and better periodontal condition when compared to BDF individuals. Including these adjuvants to conventional oral hygiene have shown to improve biofilm control during PMT leading to a better periodontal status maintenance.