Effect of smoking on salivary composition in subjects with moderate periodontitis before and after periodontal therapy

Background and Objective: There are many researches regarding association between periodontal problem and smoking but there are a few studies about this relationship and the changes in salivary composition. The aim of this study was to evaluate the effect of smoking on salivary composition in subjects with moderate periodontitis before and after periodontal therapy. Methods: In this study saliva samples were taken from 30 patients (15 smokers and 15 non-smokers) with mean age of 33 who referred to periodontal clinic of Babol dental faculty. Laboratory parameters were SIgA, SIgG, Na, K, Ca, P, Mg, Albumin and Amylase. Salivary sampling was done in 2 stages before and after scaling. Data were analyzed using paired T-test and T-test. Findings: The concentration of SIgA, K and P were greater in smokers before therapy (P<0.05). Post-treatment, K and P level were greater in smokers (K=18.8±0.57, P=11.27±0.8) than non-smokers (K=16.78±0.43, P=8.83±0.8) and Mg was greater in non-smokers (2.73±0.55) than smokers (1.16±0.13) (P<0.05). There was a reduction of SIgA and Mg in smokers after treatment (P<0.05). The reduction of SIgA in smokers (0.08±0.011) was greater than non-smokers (0.03±0.012) (P=0.005). Post-treatment non-smokers had reduced SIgA level and increased Ca concentration (P