Flawed oral health of a non-smoking adolescent suggests smoking in adulthood.

BACKGROUND Smokers often have oral health problems. We studied whether poor oral health among non-smoking adolescents is connected to smoking behaviour in adulthood. METHODS We used an age cohort born in 1979 (n = 2582) taking part in annual oral health check-ups between the ages of 13 and 15. Self-reported non-smokers were used as the study population. As measures we used decayed, missing or filled teeth/surfaces (DMF) and decayed teeth (D) and smoking behaviour at ages 13-15 and the depending measure was smoking behaviour at the age of 29. RESULTS Those who were non-smokers at ages 13-15 and had tooth decay (D > 0) in an oral check-up during that period had higher risk (OR (Odds Ratio) 1.88, 95% confidence interval 1.2-2.9) of being a smoker by age 29. Tooth decay at age 15 predicted earlier onset of smoking for those, who became smokers later in life. Dental caries (DMF > 0) was not associated with higher risk of becoming a smoking adult, but those with dental caries at age 13 were more likely to start smoking earlier. CONCLUSIONS Poorer dental health, especially tooth decay in adolescence is a possible indicator of a greater likelihood of transforming from being a non-smoker to a smoker. Dentists should notice this for allocated health promotion.