Abstract
Objectives: There was no nationwide epidemiologic study on periodontal diseases and smoking in Korea. Therefore the present study aimed to investigate the relationing between smoking and periodontal pocket formation of smokers and non smokers in Korean adults Methods: 4,391 adults aged 20 and older (2,215 male and 2,176 female) were recruited the study subjects. Data for smoking was collected by questions. Severity of periodontal diseases was measured by cpr index. Results: The average period of smoking of current smokers by ages is, respectively, 7.4 years in 20s, 12.6 years in 30s, 20.7 years in 40s, 26.4 years in 50s, 34.6 years in 60s, and 43.0 years in age group 70 and older. Among subjects in the age group from 30 to 59, smokers had a higher statistically significant frequency of affected sites with periodontal pocket greater than 3.5 mm than non smokers; current smokers had a 1.92 times greater risk than non smokers, and former smokers had a 1.35 times greater risk than non smokers. According to bivariate analysis(two-way ANOVA), smokers from age 30 to 59 displayed no statistically significant difference whether they consumed ten or less cigarettes a day or more than ten a day. However, there was a statistically significant difference among those who smoked for 15 years or less, more than 15 years, also between current smokers and former smokers(p< 0.05). According to Logistic regression analysis, in the frequency of affected sites with periodontal pocket greater than 3.5 mm aged 40 to 49 was statistically significant between those who smoked for 15 years or less and those who smoked for more than 15 years(p < 0.05). Also from age 50 to 59, there was a statistically significant difference between those who consumed ten or less cigarettes per day and those who consumed more than ten(p < 0.01). The statistically significant difference in frequency of affected sites with periodontal pocket greater than 3.5 mm between current smokers and former smokers demonstrates the effect of smoking cessation, but the effect of smoking cessation in people in their twenties and those over sixty was not clear. Conclusion: According to these results, smoking is associated with periodontal pocket formation, thereby being a risk indicator and potential risk factor of periodontitis. The dose-response relationship between the amount and duration of exposure, however, was not clearly identified.